While travelling the hardest thing for me is trying to guess how much cash I'm going to need before I leave home. Most times I over guess which isn't a huge issue if you are buying a currency that won't depreciate before you come back. However SE Asia is not known for having a currency that is worth brining back so you typically want to spend it all over there. During the trip I decided to keep track of what I paid so you can get a general idea if you are trying to plan your trip to the areas.
(1 BHT = $0.038 CAD)
