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

On the forth month I did get the four months in one lump payment which felt great, but really was just refilling my account or paying off my credit card which was stressful.

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

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.

Welcome to BP - rates have finally come down a bit so that cash flow is now possible again in some markets for classic turnkey rentals but still have a bit of a ways to go - if you have the ability to BRRRR - that is going to likely really be the better strategy to get a more robust cash flow at the start

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

You could also offer a gift card to a local gym to keep things fresh for health-conscious renters. 

They can continue living in their classic units for $X amount per month and you can agree to slowly raise it over time. 

Additionally, I have an LLC established and currently hold a business credit card with a limit of $15,000, as well as two personal cards for $4,000 and 3500.I have before and after pictures of my fix and flip, if needed.Any advice or insights on potential funding sources or strategies would be greatly appreciated!

I paid her $15K via credit card to her paypal account and another $15K by wire money from my bank.