Or is it going to trap too much moisture? 

When excess moisture is present, mold can grow.

I recommend you bookmark this site with the EPA Guide to Mold: https://www.epa.gov/mold/brief-guide-mold-moisture-and-your-...

This could've been caused from exterior water, penetration, or a poor connection over time.

Our office manager argued that all the proposed repair such as drywall, floor, paints, doors, windows, thermal and moisture protection treatment, etc are part of the tenant responsibility.

The inspection revealed moisture issues in the basement, a fastener issue on the deck, and reverse polarity of some of the outlets.We are pending lead, mold, and chimney inspections.The HVAC, furnace, and water heater are functional but "beyond their lifespan."

Additionally, all odors and smells now permeate the entire house, for good or for bad, and the same goes for moisture, grease, etc.

Here are our concerns;- Some of the floor joists have been exposed to excessive moisture and are rotting away. 

Leave the AC set at 76 or 77 so you get enough air movement and dehumidification to keep moisture problems down, and split the utilities for those few months.

I'd also appreciate any tips from expert house flippers on how to penetrate the market.I've always been blessed with meeting the right people and partners in my previous journeys and am looking forward to making that happen again.Thank you all in advance!