It's essentially financing a portion of the transaction by increasing the purchase price by the contribution amount. 

However it was a very stressful transaction for me, and the underwriting process delayed my closing 45 days.

Most DSCR lenders will not negotiate their rates since they have end investors to answer to, especially if it is your first transaction with that lender.

We’ve used Bob Lambert at Stanley, Lande and Hunter for all of our transactions.

@Michael Morrongiello Oh I know the agreements and the documents used in these transactions.

I feel they should use the transaction value still.I plan to fight with the fact that the market value was set a year ago and I have similar transactions that are lower from Refin this year and some had more bedrooms!

I could also ask him to provide a report from his business (he is self employed) of his P&L and transaction reports to make sure he is making money etc. 

I'm thinking that this would also be a good time for me to add another property to my STR portfolio because I think prices will be more competitive once the transaction volume increases.

OR you'd have to do 2 separate transactions and incur 2 sets of closing costs/ transactional costs. i dont think its a bad play, a lot of people leverage one to help them expand to the next. another challenge you will have, though, is pulling something small like $50k out. most lenders rn have a $100k min. you might be able to find less but then fees/ points will be a little excessive. 

Here’s California's https://www.car.org/-/media/CAR/Documents/Transaction-Center...page 2 item 9.