All depends on what your expenses are in Thailand, which I have no idea. Get real expense figures and then you can determine what your success risk will be.
Per your numbers in 2 years, without assuming increases in value, you will have $400K in retirement fund and $150K in house proceeds, or conservative $550K. You need to cover the 5 year period between 57 and 62 before SS kicks in. Child support will be done, but will you have other expenses for the children?
You have food and utilities, but what about all your other expenses? Health insurance, property taxes, vehicle insurance and registration, vehicle fuel and maintenance, entertainment, clothing, income taxes, and many others.
In Thailand you have to live somewhere, what is that housing cost? Gets back to you need to define total expenses. Impossible to tell you if you have enough without better information.
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Semi-Retired 7/1/16: working part-time ( 60%) for now [4/24/17 changed to 80%]
Retired Aug 2, 2017; age 53