For purchasing a single family house, stick to your buying criteria and the types of properties that you are comfortable with. Always leave plenty of room as a buffer in the budget and have a few exit strategies planned out. For rentals as long as you have a good cash flow, it should always make sense no matter what and there are always people looking to rent. There are always people looking to rent, and more land doesn't just get made, so go get those properties while you can.