Thanks for the advice, I'm going to reach out to the county auditor for any permits.The vent is just a 14' x 6' inch slotted vent.

Brush up on building code requirements: in basements you're looking for egress windows that are 5.7 sq feet or more openable (3ft by 3ft casement style windows work best), and ceiling heights 6ft 8 inches or greater (as little as 6 ft 4 inches is ok under ductwork and beams though)2.

-StevenMy thoughts exactly....we have a property we rehabbed the year of purchase & have owned it 30 years (depreciation is done) & we just spent $36,000 upgrading every inch of it.

Half of the kitchen floor is now about an inch above the other half.

You can then put 1 to 1 1/2 inch with the fines, versus a base of 3 to 4 inch rock. 

Plywood/OSB roof sheathing with a minimum thickness of 7/16"inch attached to the roof truss/rafter (spaced a maximum of 24" inches o.c.) by 8d common nails spaced a maximum of 6" inches in the field. - OR- Dimensional lumber/Tongue & Groove decking with a minimum of 2 nails per board (or 1 nail per board if each board is equal to or less than 6 inches in width).

@Lucas Miller,I think they also do concrete overlays (1/2 inch armed concrete on top of existing countertop or plywood sandwich structure)

Use this figure for your roads, water, sewer, electric.Just making the following up:Road- 25 ft wide, 6 inches thick, before curbs. 

A rehab like this can get out of hand quickly as every inch of the house will be touched. 

I am trying to decide between  3 x 6 inch subway tile and 12 x 24  inch tile for the showers.