I have google and researched, but this seems to be a industry term and not a legal/textbook term. 

Seems like a generic contract  with our  agreement stated on the bottom.

It seems like it would be hard to go wrong with one because the financing is so much easier being long term.

While grasping the overarching concept seems straightforward, I'm aware there's a wealth of intricate details beneath the surface that I'm keen to understand better.

He wants to borrow around 100k....Asked around, seems no program fits him.

I was looking into SFH or small Multifamily and have been looking into Philadelphia and it seems not so Landlord friendly per the (landlord tenant laws and asking around)  Many areas are over priced (i.e.

In my market (Western North Carolina ski mountains), it seems like self-managers get ranking priority and seem to do better than PM managed properties.

Seems 1/3 never get a response but most did and mentioned a few of the sites you did.   

It seems as though your doing well on your LTR’s.  

That seemed to accomplish the same intent as POA, however, would require the signor to be an entity member (as opposed to an assistant of yours or something).