A better option would be to rent both the two houses and you'd move to cheaper countries, either to Africa, Asia or central/southern america, and live above standard average people living there.
The real problem is if tenants, for some reasons, stop paying you
With 100K dollars, you could live like an African Warlord in a 3rd world country. Retiring with 100K dollars is such a shitty idea though. What do you even do with the remaining amount of time you have? It's like the self employment syndrome where you feel inadequate and unproductive because you always sit at home in front of a computer. My dad retired at 50 because he had loads of money, but he ended up getting his old job back 6 months later because of how bored he was.