Call some local HVAC/Mechanical companies and ask what the average cost would be for this upgrade! 

Unfortunately, I’ve run into a major issue: I received a Stop Work Notice on my property in Covington, GA, because I didn’t have the proper permits for the renovations.I want to resolve this as quickly and smoothly as possible without jeopardizing the project.Can anyone offer advice or share their experience with:1.How to address the Stop Work Notice with the local authorities?

Listen to as many podcasts as you can and attend all of your local meetups to connect with other investors.

I was also planning to work for a property managing firm to learn the ropes of the state and local codes while continuing to invest.

In order to network with wholesalers and lenders the best way to go about it will be to attend the local REIA like The Greater Houston REIA and also joining the local investors facebook groups. 

Additionally, investors should monitor local markets carefully—new supply is coming online, particularly in the multifamily space.

Unless you have a local law that says otherwise, it's not illegal to disclose this. 

Certainly one account for each LLC, (separate for security deposits based on your local rules)

Local florist closed their shop after they tried for a year to sell their business.  

I found a 4 BR home next to local hospital.