A SSN is typically issued with “permanent residence” (green card) meaning the person becomes legally allowed to live and work in the US.

One day I went into my business and spent four hours dealing with a customer's debit card.

The only downside for me is that they use a credit card which my property management software charges a fee for.

You also have to consider a Heloc is a credit card a.k.a debt burden unlike a cash out refinance its a mortgage (One loan).

Looking back I made some clear very expensive rookies mistakes and learnt them the hard way.

Yes, this system probably works for a more seasoned investor, but definitely not for a rookie.

Hard money and I was able to acquire $90K in credit lines from 0% APR credit cards.

If you're using a hard money lender that is making you do 20% down in whatever cost and interest - you're probably using the wrong one that was referred by a rookie. 

After giving some grace, I had to turn the heat back up on them to force them to make the donation.They made the donation on a credit card, and while it's a far cry from the $50k+ in damages, it was a meaningful amount of money to them.

Would receiving the 1099 interfere with my H1b extension or green card application?