If there are two borrowers, then of course if a POA is used it would be limited to one borrower...If both borrowers were available and/or decided to attend they would both sign the loan and therefore no POA.2.

And the Solo-K would enable you to borrow $50K from the retirement balance to use as you please.

IE - it's more a question of borrower pedigree, not necessarily loan size.

I borrowed 1k from a friend and invested it into a stock which has grown to 1.5k.

This is NOT Business Credit.By establishing a separate corporate credit profile on the EIN Number (separate from the business owner's SSN/FICO), investors can access substantial business credit lines, capital for property acquisitions, and renovation funds without personally guaranteeing the debt.This approach creates a powerful financial firewall between personal and business assets while potentially generating a significantly larger (ROI) through reduced interest rates, increased borrowing capacity, and the ability to scale investments more rapidly.The education gap surrounding EIN corporate credit means savvy investors who understand and implement this strategy can gain a significant competitive advantage.

It's just not in places I want to borrow from. 

You will be able to find a co-op apartment that allows rentals but whether you'd be able to close on it is another question.Co-ops with poor financials will have trouble selling units to borrowers using a mortgage.

A very prominent loan officer in NJ was charged recently for helping borrowers do just this. 

I know they've been around for quite a while, and I'm wondering if anyone would be willing to share their experiences they have had dealing with them, either as an investor or a borrower.

If the borrower creditable?