I’m considering using materials such as wood, PVC, conduit, or metal pipes, combined with canvas, tarp, or plastic for the covering.

Upgrade appliances, install new countertops, and modernize fixtures wherever you can.

I don't have any idea what it will cost roughly to make the other lot as a living space - right from assigning address, brining in utilities,  plans for the mobile home (3 bed and 2 bath) install, etc.

However my company was hired to install windows on one of her properties and after the work was completed I got nothing but radio silence.

They aren't installing a meth lab, it's a rabbit. 

You could always use those to prove they were smoking up; with that proof you can either move to evict or simply hold security and at least have some sort of proof.If you install a marijuana smoke detector I wouldn't even tell them what it is (aside from a smoke detector) as they might try and disable it.

FX, Crypto, Flipping Houses, Sub2, Gold and Silver, Rare Earth Metals, Day Trading, Bernie Madoff, Vending Machines, Car Washes, Amway, any MLM.....whatever the dream of the day is.In all of them, you can make money, you can get rich, but almost always it takes a lot of hard work, blood, sweat, tears, missed holidays, working on weekends, money, risk, stress.

We’re getting a small shopping center installed supposedly by the end of the year (Marshall’s, Tractor Supply, Grocery Outlet) plus investments in a second “downtown” strip. 

You would add value to the unit if you could somehow install a window.

Additionally, the costs on installing parking meters please?