I wonder if your borrower’s lawyer explained that if they move their LLC, they must still register as a foreign entity in the state where the property is located to defend against any actions you might bring.

I would love to know whether it is possible to apply the BRRRRR method there or other creative financing over there as a foreigners.

If you plan on self-managing the properties, then you’ll likely need to register each LLC as foreign entity in state of CA and pay franchise tax for each one.

Buying real estate is NOT a foreign affair to anyone from any country.

I also noticed that tenants who are on DHS scheme usually have a higher turnover (e.g move in and out rather quick).As a foreigner, I have to rely everything on the property managers.

In my experience in foreign countries, there is often less consumer protections/ no central MLS or licensing/ greater risk to the principals, much more red tape, and overall higher transactions costs than here so it's important to look at the whole picture not just the commish %.

Other items such as having accounts in a foreign country.If you are single/married, with a few W-2's, interest/dividend accounts with one rental property.

So, if you create an LLC in another state, you will likely need to register it as a foreign LLC in California.

I am learning "lingo", for me it is like a foreign language.  

Pretty much all the banks in Mexico lending to foreigners offer better terms but there are other countries offering better terms as well.