If you already have a property under contract or have a property in mind that you see as 60k all in you should build in 10-15% in additional costs as a contingency fund because things happen. 

In addition to the platforms you listed, make sure you’re also listed on Furnished Finder 

In addition, I think there's more "control" with stocks in the sense that you can pull your money out whenever versus real estate, the money is not liquid. 

There is HOA debt in the amount of $21k piled up from previous owner.

Right now, you are investing and aren't paying additional tax--think about that.Also, one little explained aspect is the carried over PAL is also useful to reduce your taxes when you goto sell. 

Do debt funds ever offer 100% funding for a purchase and 100% for rehab?

I think you could leverage the equity to purchase additional real estate that may cash flow better, but it really comes down to what your goals are with investing.

There’s a quadplex on the market now for $299K, but won’t be available long.If you have any additional questions or concerns, please don’t hesitate to reach out.I wish you all the best.

I would try an separate the three sources of income and debt.  

As long as you have your down payment, closing costs, reserves, and anticipated rent covers the debt service you should have no problem.