I'm not sure what state the property is in or what the rules are there, but in my state, a realtor has to show that they are the "procuring cause" of the transaction in order to be paid.

They make a commission / origination fee off of loans they procure.

My suggestion is to procure rentals in the same manner as flipping, by acquiring distressed properties and increasing equity through rehabilitation.

Some charge 50% of one month's rent, which is what our company does, so for a home in Berwick, you would actually save money using a company that charges a lower flat fee for a procurement fee.

The VA loan allowed my entry point into real estate by placing no money down versus other procurement methods, like a conventional loan.

All of these where procured the conventional way with my  own hard earned money used as a down payment. 

Highly disclose that you aren't the procuring buyer to the seller!

I have never heard of a listing agreement that did not have the "protection clause" and any broker/agent that is the procurring cause of a sale will be entitled to a commission even from an expired listing contract.

Another one i did was for a Line of Credit, I purchased for $32,200 with Cash, had to pay some back taxes and water bills,, the borrower stayed, and now rents from me, the BPO was $80K, my banker gave me a Line at $75% so $60K for me to procure with cash. its a fantastic system.  

If a Realtor was the procurring cause of the sale they will be entitled to the commission, paid by the seller at closing from the proceeds of the sale.