I know nothing about documents from the US. But if you marry in Thailand you will have to prove that you are not married somewhere else. This is hard, because there are many countries in the world where you can get married. But they accept something from your home country saying that you are not married in that country.
You want to say that immigration records of different countries are connected in such a way that a missing exit stamp from Thailand will show on the screen of an immigration officer in another part of the world ?
Does it matter? Using a property, even if it is for the duration of your life still means losing it if things go wrong. And the price I mentioned of 4.5 million Baht is right, I am sure because I know that is what the Thai owner paid himself. And now he gets 11k rent a month. There are numerous ways to invest money. If you invest 4.5 million well you will get more than 11k a month.
That is one guy. He paid too much. I pay 11k rent for a condo that is selling for 4.5 million Bath. And it gives me the freedom to move to another place tomorrow if I get bored. No way that I am going to buy in BKK and put it in the name of someone who can walk away with my property at any moment they want. It puts you in a bad position. And sorry.. most expats are in happy relationships? Is that what you see? I see different things. Most relationships fail. That is also what statistics say.
In the last 30 years, house prices have increased sixfold in my home country. What you see now is a dip. The increase is expected to continue next year. There is a shortage of housing, a shortage of building land and environmental regulations only make it more expensive and more complicated to build. The shortage of houses will continue and prices will only continue to rise.