I am Dutch Citizen and I have a B1/B2 visa, expiry 2022; I work overseas for a Dutch international company;
I enjoying spending time as a visitor in the USA but prefer to be renting (or even purchasing and sub-renting a part of) a house/apartment instead of staying in hotels all the time.
I have a girlfriend in USA so I visit her a lot, but I do not reside in the USA, because my work location is overseas (Panama). Once I was "interrogated" by CBP at the airport of residing in the USA, which I don't. I am not very familiar with the definitions of Resident or Non-Resident, but I read something about being classified as Resident Alien if you are more 183 years over 3 years in the USA, which I haven't been.