I am not talking only about the requeriments. But about their visa policy. Even if you are married, or working , they can change from night to morning the conditions of your stay, and it happened already to me 3 times. In 12 years that i am living in here.
You can live well with that amount but yes that amount doesnt make you rich in any part of the world. You can live well but since you adapt yourself to the country thats the difficult part everything works different in Thailand. Can live cheap but not expecting luxury , also expect many people try to scam you, difficult burocracy, the sewage system not the best... Of course the life expectancy there is like 60-70 yrs for something. But yes visit first but i recommend you for that amount the caribbean