Check out companies like Prypco for those opportunities.Finding a mentor is also a smart move!

Make sure to get it installed with a 3-way bypass so that even if you remove the filter, you can still have water to the apartment by turning on the bypass valves.US EPA requires city water companies to have 1 ppm of chlorine concentration at the consumers faucet so that there is no danger from waterborne microorganisms.

I have demo'd and used various Property Management software over the years. 

I would be asking the title company and my attorney what are the ways around this?

The cheapest company...usually is. 

Curious if anyone has had any luck managing all these aspects in one singular software?

I also used my accumulated experience here to start a remodeling company, where I helped local homeowners with their projects What made you interested in investing in this type of deal?

That said, this method is only for investors, title companies and sellers who fully understand what a 'subject to' transaction is and put the proper protections in place with the respective paperwork.2 is to use an Infinite Banking strategy which is done by using the cash value built up in a permanent life insurance policy through a loan at roughly 5.5%.

It probably isn't an issue for a company who is already operating at an airfield, but I'd check with airport management to confirm your improvements don't violate the lease if you branch out to just standard private hangars. 

As a former PM, I have ran up to 6 jobs at a time with one company and 3 jobs at a time with another design & build company.