I'd stay away from 35805 if you do not know Huntsville well or do not have a strong team here helping you. 

I learned how to stay within a budget how to select the right finishes for the price point of the house and how to pre-market it when neighbors walk by and stop to talk and every time you're at Home Depot which was right around the corner.

traffic, noise.....I stay away from it...

In fact, the last property we acquired onlybrequired a basic environmental assessment, but we chose to do a full Phase I so that we were more comfortable with the property from a buyers standpoint, but also from a future seller’s standpoint.

He moved from one site where he stayed for a few months, then to my other site. 

I'm eager to go out and grind and make that first deal just have a few more things to feel comfortable about before doing so.

Is it better to do a small increase and increase my chances of them staying?

The money you put into a house that is bleeding, isn't lost unless you stay with that house. 

After that, it is only what your family is comfortable with financially. 

The other thing to keep in mind is to be very careful with the owner staying for six additional months.