They spend money to get qualified leads (such as you) so the site is free for consumers.

Do activities that generate the highest value possible, most often finding deals or selling yourself/your product.

Lead, list, sell!

I'll spend some time following these leads.

. - Have you been given the disclosures (Sellers and Lead)?

The rental unit is not generating income yet so I could fund the business checking account from a personal account until there is revenue to pay the mortgage. 

I have them fill out w-9, lead paint form and lease and take the deposit.

If you want to factor in utilities and furniture for the house, it's about 9-15 months before everything is paid for with the profits generated by each individual STR. 

What I'm really looking for is a lender that will allow me to group my three rental houses together to generate a HELOC.  80-85% LTV would be great, but I'd accept less.Ideas?

If you provide it you are responsible to repair it, the fact that the washer and dryer were there when they moved in would lead me to lean towards a you should provide laundry services answer, however you may want to switch out to coin laundry or submeter the water for the future anyway.