I to did mine in Thailand and never paid a penny, but he's biggest problem is getting a bank account/ today so he may have to put the money up for that
You can go to any government hospital, you will pay 25% more than the thai people and as you have a thai wife you should take her with you as most thai nurses don't speak English
0 condos for sale and rent in Bangkok alone and they are still building them it's not going to end well once you try to sale it your better to rent for a few years to see if you are happy