Everything is functional, but just outdated by nearly 4 decades.

Buying cryptocurrency essentially always is.Advantage two (really, advantage one part two) is that because real estate returns hinge on the functioning of the asset, real estate investment enjoys a much healthier effort-reward ratio than investment in cryptocurrency, whose return largely hinges on the valuing of it.

I work 4 weeks out of state and then I get two weeks off in rotation.

If you are doing property management many of the functions of property accounting will be included in your property management software.(5) There has to be a captain of the ship.

It was very distressed, the roof leaked, 1 of the 2 bathrooms was in non functioning, and it came with 2 "tenants" living in trailers that we had to remove.

Then we went at the rest of the house all at once, leaving 1 bathroom in tact which was a terrible and barely functioned but did the job.

Everything is functional (new HVAC, ok roof, good appliances), just a bit out-of-date bathroom, kitchen, floor, very old kitchen cabinet.

You can use the search function and find these recent discussions. 

Properties of that type in that condition(fully functional but dated) were selling in the 40's, while fully remodeled version in the same area were trading at 90 to 100k.

If they press the matter, get a couple temperature data loggers to place at a central area on each floor so you can review the actual temps over a period of time, and be able to see the AC cycles as the temp rises and falls.You don't say what "other" maintenance requests they have been giving (generally, you should only be dealing with actual functional issues, nothing cosmetic or as a requested upgrade), but I might just advise them, in writing, that since they are clearly not happy here, you will let them out of their current term with no penalty if they can turn over the property and keys to you within 30 days.