Who is footing the bill?

The house is a 4bd/2ba 2,300 square foot.  

I also have a general question, trying to understand what's a good rule of thumb square foot construction cost, people usually say 100 to 120, does that apply here in SLC, also does it includes developing the land? 

The home is 2200 square feet with 3 bedrooms 3 bathrooms, and a 600 square foot permitted mother-in-law apartment.

That's great if your primary goal is getting your foot into an expensive market.

I barely offer non-qm any more, and due to the speed/competence issues I wouldn't touch your 28 day timeline with a 10 foot pole. 60 days is more realistic. 

There is already an area large enough for two or three homes that does not require any grading or tree removal and it's closer to the subdivision around the corner (with enough space for a yard even with the 40 foot set back requirement from the road).

Remind her that it is in her best interest to put her best foot forward with the new landlord...do NOT word it that way.

You must maintain a 1/4-inch-per-foot slope tie-in to the sewer.

The home is a 1250 square foot single story residence with three bedrooms and 2 bathrooms on 1/3 acre.