For Thailand, you can live like an absolute King on what you have...Do keep in mind though, that you will always be in considered a foreigner there, and jump through periodic bureaucratic hoops to maintain your status as a foreign resident there. You will also need to be smart and not blow all your money on all the hedonistic temptations, T-land has to offer.
Costa Rica, will also present an attractive retirement environment for the America Expat. It won't be as cheap as Thailand, but certainly cheaper than trying to make a go of it here in the sad (and unraveling) USA. It is a friendly place by in large, and pretty safe as well. Perhaps you'll even find yourself a nice Tica to settle down with. With its beaches, rain forests, mountains, etc., it will provide plenty of leisure opportunities. Your money may not go as far there though...
I don't think I need to spend much time talking about retiring here in the States...Obviously, the country is in steep decline in every possible way, although there are still retirement towns that offer nice opportunities to watch the Apocalypse unfold around you. Arizona, Nevada, Florida are some possible choices, but your savings will either be stolen by the government, or used up to try and buy yourself health insurance to stay alive.
Good luck with you decision...
