^^ You could consider Nong Khai as well. It's probably cheaper than Chiang Mai but it's not going to have modern golf courses, etc.
If you want to go to Thailand you have to you it for yourself. Doing it only for your wife or daughter is going to make you miserable.
I'm going there for myself because I want to travel in Asia (will be much cheaper to do it from Thailand than the U.S.), I want to make my own house the way I want without some BS homeowner's association legally preventing me from making it the way I want, I want a place with a good exchange rate so that my savings will last a long time, and, I want to go somewhere where the food is good, cheap, and plentiful. I had these plans before I got married and my wife makes it easier to accomplish it due to her citizenship status there.
Strange enough my first option was Vietnam. I almost married a sister of a Vietnamese cook I knew many years ago.