Might as well buy an NFT.

I have the single family from buying it as my first home and instead of selling when I moved, I rented it out.

The excess, if any, is generally held for the borrower to claim.So, in most states, when a property goes through the auction, the subordinate liens are wiped out. (22nd mortgages, HELOCS, HOA liens)However, when no auction is held, (you buy the property before the auction occurs) the liens survive and are still owed.

As a long-term buy-and-hold investor in the Tulsa, OK market, I can tell you that “tornado country” sounds scarier on paper than it plays out in day-to-day operations.

Quote from @Stephen Macknik: I'm interested big buying a partially vacant stabilized 6-unit building in Manhattan.

I am trying to buy a sub to deal in Philly.

Yes, you can buy in an SDIRA or a SD401K however, having the mortgage in your name is a prohibited transaction. 

This is how I got started: I bought a home to live in, fixed it up, and waited for some equity to build before buying my next single-family home and renting out the first one.

A lot of people buy now, rent it ou, then retire into it.

I helped other investors buy out here for STR.