I haven't tried suggesting an installment sale or done an owner carry (other than one pre-foreclosure) and have just done cash wholesaling so far.

They paid us monthly and we were actually earning extra $500 from it.

 A lot of banks go to 95% like Navy Federal or penfed and various other CU's.TCF like Paul mentioned is not a fixed or closed end second like you said you were looking for its a HELOC which is considered an open ended loan since its a line of credit and can be used, paid down, and reused/ "open."

Some never close and you don't get paid at all for that work.  

Also you might check out pre-fabs. 

I gave him contract #2: purchase price $250,000 with $25K down and the balance at $1,500 a month for 5 years and the balance of $135,000 paid at the end of the 5th year.

Otherwise, it's a huge waste of $ to get paid ads without having anything to show, which consequently only increases bounce rate even if it does increase page views (false positive).

In time, you may find your best deals come from properties where previous investors paid way too much and failed.PS:  It's a personal crusade of mine, but don't feel like you have to pay percentage-based fees for work that bears zero correlation with asset value.  

We are interested in all aspects of real estate investing whether it is Wholesaling, Pre-habbing, rehabbing, rent to own or buy & hold.

I include another month of holding costs in my projections to accommodate extra time needed to close on the pre-sale.