They are marketing a cap rate that doesnt include real numbers and compresses it further, with interest rates going to rise, I see negative cash flow in the future.

Consequently, they tend NOT to be very creative but focus on price point, resulting in profit margin compression.

Probably something with 4-5 bedrooms, 2.5 baths or so, finished basement, nice green property and area, no McMansions, no ostentatious stuff, no huge bedrooms, no high ceilings, 2 stories, 2-3 car garage, maybe ~2500 square feet give or take?

And if he says he's interested, what would a fair compensation be since I am so green?

The question of which is better, leverage or cash flow, is like asking which is better, a new car or a green lawn. 

Trulia shows the crime map to be the safest, all green as far as you can see.

Green is what we are using.

Green is what we are using.

Green return receipt post card (or copy of) or sheriff notice (in some states) will generally suffice. 

It wasn't all green yet though because our initial contract with the seller was expiring in a few days.