Is that $80K total or for a down payment. 

For example, cash advance apps don't report activity to the credit bureaus unless you are seriously behind on your payments.

For real estate, saving to get the down payment ready will be the first hurdle.

A reverse mortgage can be paid off, but the parents may have trouble obtaining financing as typically a reverse mortgage is received when borrowers have trouble making monthly payments and have little income but lots of equity.

I have 23k in business credit that I want to use for a down payment on an investment property.

Or covering down payments?  

I am currently  in the process of purchasing my next primary home in GA using a VA loan and my own savings as a down payment. 

You have many possibilities:Research Contract for Deed & Seller Carry back financing.If they were able to qualify with a non QM lender for the 1st Mortgage  you could possibly have a 2nd position loan with an equity participation component. 

My monthly payment is coming to about $5,000.

I have not dealt with this in the past, but i know fellow investors who have had money partners put in for the down payment and given the money partner a return on their partnership.