That depends on where in Thailand you wanna live, this should give you an idea about how much it costs in Bangkok.
http://www.thailandguru.com/tips-living-cheaply.html
*edit*
With that said, in Bangkok a luxurious highrise condo in the Sukhumvit business center, 2 bedrooms, fully furnished kitchen, living room, dining room, two toilets, swimming pool, etc.
Would cost about as much as a shabby 2-3 room appartment in Sweden without anything special, and definitly no pool.
Hmm i wonder where im gonna retire!
