I was wondering if there are companies out there who work as an intermediary to do that, I cut them the check and they go to the county on my behalf? 

The previous owner scheduled the power to be cut off. 

We didn’t want the down payment cash tied up that long.

Given your time horizon, your lender have a floating rate product [the HELOC] tied to a fixed rate loan, which is a bad idea, never mind the fact that they could call the HELOC at anytime. 

I mostly chose the career path of CS in order grow capital for my real estate investing faster, and I'm very happy with that decision.I think tech is an amazing field to work in alongside real estate investing; find a company that respects your life outside of work, and remote or hybrid work helps with cutting out commute time!

I have mentioned to him about giving him majority ownership in that LLC and then buying it that way then either buy the LLC or the LLC will sell it to him for the original price minus my cut or whatever but I am not positive about how to legally do that or anything.I am really a green horn who had an opportunity to help other people while hopefully earn a bit of money for it.

I bought last year, I bought two new houses this year and am actively making offers trying to tie up four more deals this year. 

Short term rentals are much more risky than long-term rentals because vacationing is tied in with the overall health on the U.S. economy.

They are not interested in lending the money but rather are interested in a percentage of the cut.

I'm trying to protect myself to make sure the potential cash buyer just doesn't go behind my back and cut me out of the deal completely.