I am doing my cladding on the outside, with closed foam insulation.  

Buyers are lining up down the block and foaming at the mouth to purchase homes. 

You may be able to shave several hundred dollars off a larger job that way.

I will cut back on my work hours (if I can) during the month of March and half of April study real estate and complete the "home inspection courses" need to become Certified.My entire drive for real estate is not only to have long term retirement income but to own my one foam filled penalized factory, then to construct fast built home in which a home is 100% competed in one to three weeks.  

1031's have to be handled very carefully.

Contractor replaced the bad subfloor and sistered the rotted beams in the wall.Many light fixtures were missing and we installed new ones ourselves.The water heater shorted out and blackened the inside foam pad.  

A few other little tricks that can shave weeks. 

You can also see if there are obvious signs that a tank was abandoned (filled with sand or foam) in the past--like a fill or vent pipe (wide pipes going vertically up) near the basement outside, or a weird circular depression about the size of a tin can top in the concrete usually in front of the house.

Manufactures have the option of switching to better insulation (high-density closed cell foam, vacuum insulated panels, etc) and could exceed the new benchmarks without making the tanks physically larger.

I live in a cold place and people want foam Paint: $3/sq ft.