I’m not sure what our think Murphy’s Law says, but it doesn’t result in someone finding a soulmate.
In a nutshell, Murphy’s Law states that “anything that can go wrong, will”. It is sometimes decorated with the add-on “and at the worst possible time”.
As for CoL costs it totally varies. Some of the local people I hire can live off their salary of $700 a month. A comfortable western lifestyle would be about $3k a month, imo. I spend a lot more due to travel.
He's running his businesses in a tax efficient way so he's keeping a lot more of his money than when living in CA.
Now I haven't been to Thailand, but in Vietnam you could live very, very comfortably for half that.
Some western foods for example are highly priced compared to local options: imported au/us beef is similar cost to Australia ($20-$30 a serve) but local "steak" is maybe $3 to $4 a serve. It also has the consistency of a finely barbecued shoe.
It also depends on the area. A lot of expats want to live in areas surrounded by other expats, so things are priced higher in general.
If you go live "in the sticks" ie you will stand out as one of few/only foreigners in the district, things can be cheaper (once people know you're a "local")
I came mainly for the tax benefits base and low cost of living of setting up an office in Thailand. There's quite a lot of annoying bureaucracy involved but a good agent can handle that. It's also a great place to self fund a startup as your team can all live quite cheaply giving you double the runway.
Anything else I can add has probably already been said.