Would personally guaranteeing the loan be something that would pierce the corporate veil? 

I think they meant their Corporate Office.

Mcdonalds most are franchised owned and not corporate.

I have been contacted by multiple corporate housing companies that would like to secure long-term leases and then operate it themselves.

I'd look on the 'Judicial Sales Corporation' website.

ALE SolutionsTaCaresTHD HousingHousing HQUnited Corporate Housing(And I've also gotten from Airbnb and Furnished Finder)

The Corporate Transparency Act (CTA) has been declared unconstitutional by the United States District Court for the Northern District of Alabama.

My thought on the Corporation vs LLC was to switch my self employed business from a LLC to a Corporation and use that Corporation to invest in real estate.

Nevada Corporate Headquarters (NCH)

I personally have a very small portfolio and I help manage a few;  I've focused more on the coaching, consulting, and education side, first as a coach in someone else's high end program and for the last 2 years on my own -  building a life more reflective of my goals today in my post 9 to 5 corporate life.