Essentially, each property owner has two accounts, one in USD for rental income, property management transactions, and commission paid to me, now the other account is in a foreign currency and deals mostly with the rental expenses and transfers from their USD account to cover these expenses.Any suggestions would be greatly appreciated!

Based on the pictures of the properties, the condition seemed to be acceptable, but of course, I had to depend on the local agent to help inspect them properly at purchaseYou mentioned that you had helped foreign investors invest in Atalanta.

TH is just where I chose to start for focus/price point reasons.The SF market is ridiculous right now with the influx of tech millionaires, foreign investors that want to overpay, and 10k+ airbnb rentals reducing supply.

Lenders who work with investors who are foreign nationals usually require a significantly higher down payment. 40 - 50%, unless you can find a partner who is US based. 

Also the practicalities of working remotely that too from a foreign country are very complex.

I was just about to say this, if they can prove they have legal documentation for being in the United States 'temporarily', that is good enough for me to judge their character, since it's hard enough to obtain any type of Visa from a foreign country.

The one thing I never discriminate against is green US currency:)

Airbnb guest is a foreign visitor, and wants to pay directly to save on all their airbnb fees.

All states require that you register as a foreign entity if you do business there, so the bulk of the benefits of out of state incorporation go out the window.  

The IRS does allow you an exemption on the first $99'000-something in foreign earned income though so unless you are a high-earner (and not many of those exist in Thailand - and none of them are English teachers) you'll fly under their radar (you still need to file tax returns though and declare the income).