However, the issue for me is after doing my numbers he'd still need to be way lower than $175k.

I am sure they would not be the first foreigners to invest in the US, I just want to understand how can they do so by either minimizing (legally) their tax implications in the US or avoiding double taxation.

If you are doing it yourself this isn't a bit issue. 

One month ago I made an inspection and tenant stated that there are no drain issues.

But I'd sell the rentals one at a time as there are issues, vacancies, capex, etc.

While a mini storage, apartment building or some other type may sound great they all come with their own issues and stresses. 

I’m having issues with people being able to fill out applications on Zillow.

If this is an issue, don't do the deal. 

My primary goal is to find a legal partner who is responsive, reliable, and thorough, ensuring that all parties are kept in the loop and that closing can proceed smoothly without last-minute surprises or delays.I'm reaching out to this knowledgeable community for advice:Have you worked with law firms not based in the state where you were purchasing property, and if so, how was your experience?

Not an eligibility issue so much as who is able to take it on.