In our experience, Indianapolis is more street-by-street - so you are correct when you say you can go one block in another direction and get the opposite appearance/comps in the value of the homes. 

Does anyone have a promissory letter example or can help me with wording they’ve used to insure its non refundable if he changes his mind and that I promise to not rent out to someone else.

Newer block homes 1-1.5 miles outside of the central town still do well also, especially if kid and pet friendly. 

Great developing area, good for growth.Located near the VA Hospital just one block away.

Mainly for people working night shift to block out their windows. 

Like it's not in the worst area but few blocks down the road there is greyhound bus terminal and some unwarranted foot traffic.

What kind of construction (metal kit, pole barn, cement block, other).

I live a block away from mine, and I can handle things that constantly bubble up and not pay 30% to others."

Not unlike nearly every letter in its name. 

She gave us her address and said it the scariest house on the block.