can i create some sort of clause that makes the tb liable for the fees even if they dont take the deal? 

This addition is designed as a completely separate unit however it can easily flow into the existing house, creating a 3/2 with minimal work if needed.

That seems high to me, but I haven't done a lot of research into what individual units go for in that immediate area.

I've had streets where I couldn't find a single property to add to my list and I've had individual streets where I add 10 houses over the course of five minutes.

I had to prime and paint all walls, put tile in both bathrooms (we created a second one).

None of the volunteers here can create a wholesaling business for you, you're going to have to take the initiative to build up a lot of knowledge on your own and then ask specific questions when you run into challenges. 

Can one expect success by just creating a website through Lead Propeller for example, and paying the monthly $49?

Heuristics are great for quickly weeding out terrible investments, but they should only be the first step when considering the merits of any individual property.Imagine 2 identical homes built at the same time across town from each other.  

Look at it another way - - the vacancy creates the opportunity to raise the rent on that unit.

Personally I think @Joshua Dorkin created BP for investors to help other investors.