- How can I estimate expenses for installing utilities and creating roads, sidewalks, and drainage systems?

In regards to having a EV charger, Id seen a lot of people install the outdoor rated ones in their STR and it helps to draw the people that may be renting a EV during their trip. 

RJ Gullo advertises everywhere about 1031 exchanges - I've never used him, but I know he does them.From what I understand about what you said it looks like you are trying to do an installment sale (downpayment now, then payments overtime).

Instead spoke to my friend that I will pay commission to my realtor-friend, on 16 installments and no interest on it.

or "Could I see where you have installed these units?"

Or should I have Ring cameras installed outside.

Other small things I do besides leasing, mangement, some maintenance, are installing keypads to doors, programming gate remotes, garage remotes, doing walk throughs, doing walk through videos (15-20 mins move in/move out videos), advertising videos, take care of our website, our portal, fix the gates and cameras when they go out, just like everything you can think of.   

By installing our own, we remove the wear and tear and damage the tenants do by moving W/Ds in and out and hooking them up wrong (which is common) and using cheap components that cause leaks and destroy floors and walls.

You can use a card reader on the coin-op feature to address that, but you are into micro-issues at that point that I wouldn't want to deal with.A proposal: Tenants, installing separately metered water and electric lines that I pay for, then bill you for, will cost me $5,000 (or whatever).

Consider adding motion-detecting floodlights and installing visible CCTV cameras around entry points to deter crime.