Yes. Getting them is the hard part.

By being a very senior person with lots of experience

On weekends

As a full time employee, no. As a contractor, yes, you can pay them directly yourself and not through the LLC even if you want. And that’s what you are going to do either way, as a US LLC you can’t hire an European resident as FTE, since they are not US residents.

Alternatively, you can incorporate in the relevant European country, hire the person as FTE, and just inject capital there that has already paid taxes wherever its relevant, but it’s going to be a lot of accounting and regulatory annoyances.

The best “mixed” option is probably to hire through an employer of record if you can afford it.

Takes too long to learn the language of a place you’re just going to be in for a few months. For all intents and purposes, you’re a tourist. If you’re planning to become a permanent resident, sure, go ahead, since it’s not great to live in a place where you don’t understand what people say.

Impossible to tell yet, anything can happen in that country

Only country almost without roaches is Iceland, but the cost of living is not close at all to Thailand.