Or would I still need a key principle.

My comments about win-win were around my personal approach to life, the set of principles which I try to apply to everything I do.

Don't just attack at first sight. 

There are many possibilities and arrangements that could be done whether through partnership llcs, joint venture agreements or simply a promissory note with deed of trust.Alternatively, you could arrange such a deal yourself and learn along the way but I would caution working with friends/family money until you feel confident in the investing principles, know your weaknesses(outsource these) and strengths and have a plan of action.

Side note: According to many Game Theory principles, once a strategy has become too popular, there is little to no arbitrage left to be had, considering risk. 

Banks follow what is called an "amortization schedule") that means that each month a little more of your payment is applied to the principle and eventually you have paid enough to actually pay off the loan and all of the interest. 

The website is a lead capture sight that draws people who are looking to sell their house.

Other benefits as well:Tax depreciation Principle pay down (building your wealth instead of throwing your $$ away by renting)Hands on experienceYou're taking action and getting yourself in the game!!! 

I'm open to suggestions and I'm aware of the liability getting the loan with exit no deal in sight.

Don’t lose sight of the importance of building relationships with people in your circles.