The guy doing it is going to check thoroughly (cameras and everything).

I know a bit about this business.First off, there are a handful of companies that completely DOMINATE the markets all over the country which are Lamar, Clear Channell, Viacom, CBS, and a couple more companies probably control close to 90% of the supply of boards.The biggest thing you need to know is that digital billboards make a RIDICULOUS amount of money.

Maybe even do some video cameras.

I am considering adding this to services offered to clients, out of area and local, these properties are vacant, and no utilities.I am thinking of purchasing a system, putting it in, and removing it once property is rented/sold.I’ve seen stand alone solar cameras with cellular, im researching cost, and I want to provide access to owner if they wish to view the property remotely. 

If you want sign placement on your property, you need a viable location and get approval from your city/county.Most of the new billboards in our area are digital, so the startup expense is extremely high.

I can use a mini and fix it too and dig it up.

One of the tenants does have a ring camera but it was there when I bought the property can I claim that as an unauthorized modification?

In high-rate environment, with double digit interest rate and high inflation, you lose money and make the lender cash-flowing (not you, you're literally suffering).

I always maintain digital files of every set I take, under a main file of the property address (for each SF property, with subfolders for each unit of a MF property), named "move out", "RTR" (after a renovation or freshening up), "plumbing leak" (to show damage and original source issue, as well as after repair) or other project files, "exterior" and, for long term renovations, periodic "status" update sets, with all filenames including the six digit date (032423) to make it easy to review at ANY point in the future (do not rely on the "file date" generated by the computer, as it will change whenever a file or folder is moved).

We manage retail parking lots digitally using LPR as an alternative to towing.