When I tried to get it when my side of the family found out and tried tp take over reverse mortgage payments to bank because she had died it was to late so they sold the house to Hud and then other reverse mortgage companies but a relative still lives there so they can't kick them out.

They are a corporate housing company.

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

Quote from @Brandon Blackmon: @Bruce Woodruff 100% the answer I'm looking.... a solid GC, has a 20-25% markup to I would for sure know going into this that these are private companies and they can set their own fees. 

Here's an article with things to consider when selecting a cost segregation company.

However, that was a fluke.Warranty companies are in the business of making money.

I’ve been contacted by the Angi company but I’ve read a lot of negative comments regarding how the treat their contractors.

Single-family management companies are seeing interest from buyers.

Depending on the type of commercial you want to get into my suggestion is to go work for a company that does commercial real estate as learning from people who do it and getting paid at the same time is not a bad strategy 

In 2021, my company earned just under $1,000,000 in net revenue and I personally pocketed about $325,000.