The majority of my info came from listenting to other podcasts and reading a few travel blogs.

The blogs from which I took the majority of my info are https://www.bemytravelmuse.com and https://www.indietraveller.co and the particular posts are: 

https://www.bemytravelmuse.com/the-cheapest-destinations-to-travel-to/

https://www.bemytravelmuse.com/how-much-does-it-cost-travel-the-world/

https://www.indietraveller.co/top-cheap-places-to-travel/

The podcasts I listen to include:

 The Extra Pack of Peanuts Travel Podcast

The Indie Travel Podcast

Zero To Travel

Travatical