Hacham Ovadia Yosef ruled that if a person needs to undergo surgery during the Nine Days (from Rosh Hodesh Ab through Tisha B'Ab), and the procedure could be delayed until after Tisha B'Ab without endangering his health, then he should postpone the operation so as not to have it done during the Nine Days, which is an inauspicious time. Although it is customary not to make weddings during the three-week period from Shiba Asar Be'Tammuz through Tisha B'Ab, it is permissible to get engaged during this period, and even during the Nine Days – and even on Tisha B'Ab itself. One may also host an event to celebrate the engagement, though without a festive meal. If a couple is getting married after Tisha B'Ab, wedding-related purchases may not be made during the Nine Days. These include clothes and other items for the wedding, as well as furniture and utensils for the couple's home. If, however, there will not be enough time after Tisha B'Ab to make the necessary purchases, or if the products might not be available after Tisha B'Ab, and the groom has yet to fulfill the Misva of Periya Ve'ribya (procreation) – and thus the wedding should not be delayed – then the purchases may be made during the Nine Days. One should not have his house painted or redecorated during the Nine Days. Work that is necessary for basic living – such as repairing plumbing, doors or windows – is allowed, but work that merely enhances the home, such as painting, wallpaper and carpeting, should not be done during this period. It goes without saying that building luxury items such as a tennis court or swimming pool may not take place during the Nine Days. In a synagogue, however, even work to enhance the building is permitted during the Nine Days, as it is a Misva to glorify the house of prayer. If a Jewish painter has no other source of income, and if he does not work during the Nine Days he will have no money for his basic necessities, then according to some Poskim – including Hacham Ovadia Yosef – he may be allowed to work during this period. If a Jewish painter was unable to complete before Rosh Hodesh Ab a job for which he was hired, and he if does not complete it during the Nine Days he would suffer a financial loss – as he has other jobs lined up for after Tisha B'Ab – there may be room to allow him to finish the painting work during the Nine Days. In such a case, a competent Posek should be consulted for guidance. If one hired a non-Jewish painter, and he wishes to continue working during the Nine Days so he can complete the job, the Jewish customer should try to convince him to agree to postpone the work until after Tisha B'Ab, even if this entails paying some compensation. If the painter cannot be convinced, then he may be allowed to complete the work during the Nine Days. The Ben Ish Hai (Rav Yosef Haim of Baghdad, 1833-1909) brings from an earlier source that one should not purchase wood during the Nine Days, in commemoration of the loss of the "Aseh Ha'ma'aracha" – the firewood on the altar in the Bet Ha'mikdash. Since we mourn in this period the destruction of the Bet Ha'mikdash, and the loss of the ability to offer sacrifices on the altar, it is appropriate to refrain from purchasing wood. Hacham Ovadia Yosef writes that according to this explanation of the custom, it applies only to the purchase of firewood, since it commemorates the loss of the firewood on the altar. However, Hacham Abdullah Somech (Baghdad, 1813-1889), in his Zibheh Sedek, writes that one should refrain from purchasing firewood during this period because we lost on Tisha B'Ab the building of the Bet Ha'mikdash, which was made from wood. According to this reason, purchasing wood even for building purposes should be forbidden. Hacham Ovadia Yosef concludes that since the Ben Ish Hai did not mention the reason given by Hacham Abdullah, it seems that it was not accepted. Therefore, although one may not purchase firewood during the Nine Days (such as if he wishes already then to prepare for the winter), he may purchase wood for construction purposes, or to build furniture, if he is planning to build after Tisha B'Ab. Hacham Ovadia Yosef ruled that in Israel, contractors who build homes with the intent of selling them for a profit may continue their work during the Nine Days, due to the housing shortage in Israel. Generally, one should not build during the Nine Days for the purpose of earning a profit, but Hacham Ovadia felt that given the urgent need for more homes in Eretz Yisrael, construction on residential buildings should not be suspended during the Nine Days. Rav Yisrael Bitan clarified that although Hacham Ovadia wrote this in the early years of the State of Israel, when the country saw a very large influx of immigrants, creating a dire housing shortage, this is true even today, when, thank G-d, many new couples are marrying and need homes. On Tisha B'Ab itself, however, the work should be discontinued. One whose new home becomes ready during the Nine Days may move in, assuming that this is his primary residence into which he is moving to more comfortably accommodate his family, and he is not moving for luxury purposes. He may even host a Hanukat Ha'bayit celebration during the Nine Days after moving in– and he in fact should do so rather than delay the celebration. Although it is customary to conduct the Hanukat Ha'bayit within a year of moving into a new home, it is nevertheless preferable to have the event as soon as possible, and so one who moves into a new home during the Nine Days should host the Hanukat Ha'bayit immediately. Light refreshments may be served at the event, but music may not be played. Normally, when hosting a Hanukat Ha'bayit, the homeowner wears a new garment and recites the Beracha of "She'hehiyanu." When the event is held during the Nine Days, one should wear the new garment and recite "She'hehiyanu" after Tisha B'Ab, as it is customary not to recite this Beracha during the Three Weeks. One should not purchase fine jewelry during the Nine Days. Nevertheless, a jeweler may continue operating his business during the Nine Days. Since people purchase jewelry more frequently nowadays than in the past, such purchases do not bring special joy as they used to, and so there is room to be lenient for somebody who earns a livelihood from selling jewelry. One may purchase a new car during the Nine Days if he needs it for his livelihood. If, however, he wishes to buy a new car as a luxury, not as a necessity, then he should wait until after Tisha B'Ab, unless the car will cost more money if he delays. It would seem that there is no distinction between buying and leasing in this regard. One may purchase new Torah books during the Nine Days, and if he needs more space for the new books, he may buy new bookshelves. In general, one may purchase furniture that is needed for basic living, but not furniture that is needed for luxury purposes. One may buy simple clothing, such as socks, but one may not buy more significant garments, such as a suit. However, this is permissible if the price will be significantly higher after Tisha B'Av. One may buy material during the Nine Days to be used for making clothing after Tisha B'Ab.