Can you post a link to a site that shows those figures? In checking I found different amounts and options. https://smartasset.com/retirement/how-to-retire-in-thailand. What I found interesting is that a person needs to be 50 years old to get a retirement visa.
Allways go to Thai Embassy website in your country !. Visit 1st as tourist !.
You must have a traveling insurance, minimum of US $ 100K or no entry !.
Too many times Thai hospitals stiched drunk tourist drivers for free. Top hospitals in Thailand !.
Stay away from scooters !.
Thailand of 1980 is long gone & all those BS stories too !.
Country is cash loaded & is not cheap.
When there, regional immigration office will give you all infos about visas/residency !.
Tropical climate, fresh food & Land of Smiles =
Book hotel for 3 nights only, 1000's of hotels to choose from !.Never pay over $ 50 p/n !.
Travel ultra light , no leather shoes,jackets, suits or long pants !.