I am currently looking at a 2/1 1160 sqft .5 acre lotBuilt 1960 Pier and beam Foooded during Hurricane Harvey and all Sheetrock, insulation, and flooring has been removed.

Current duct work size, age of home, current insulation etc.

@Nick BrimmerqIn my experience, older properties are more likely to have landlord paid utilities. 50-100 years ago; utilities were much less expensive and if you were to open the walls of a 100+ year old home; you are likely to find newspaper as insulation. 

permits for all work stamped, passed all rough work, being insulated and closed up by end of November. for sale by end of December Lessons learned?

Not true.A liability insurance is a must but will not cover you against all risks.For inside liability risks, a liability insurance may cover you up to their limit, but your personal assets are at risk if your insurance is refusing to cover you (read the many, many pages of exclusions of your policy) or if the claim exceed your policy limit.For outside liability risks, if you don't have coverage from your personal liability and/or umbrella you may not be covered either.An LLC put your assets in different boxes and insulate each box from each others.

This project has taught me a lot about Solar, energy efficiency, thermal envelopes, and different types of insulation.

Insulation?

This would decrease gas bill.We could also add more insulation and possibly put in Honeywell app. controlled thermostats.Next, the lakefront unit will now be unoccupied d/t the owner is living here.

The thing is the bathroom is not propertly insulated, so winter months if is 5 degrees outside is 5 degrees inside the bathroom, summer if is 85 degrees outside is 5 degrees inside. 

This large 3/2 home with a large bonus room is nearly 100 years old, but it is still in good condition, and has been updated with new HVAC, insulation, electrical (installed by previous owner), flooring and paint, windows, and kitchen backsplash + counters.