Also, whenever I had a technician come to my home to do anything from replacing windows to repairing my furnace I shadowed them and asked a lot of questions.

I think that is why you see so many out of state investors fail.In-state investors learn to vet the ceiling, foundation, windows, floors, kitchen, bathroom, etc.

We installed new bathtubs, drywalled, installed new kitchen cabinets, windows and everything to make every apartment like a brand new house.

The complex does not have central air and previous tenants were using portable AC units that we’re sitting in the window.

A deer jumps out in front of you - the sewer backs up; you get a flat - someone backs into the power pole; a rock cracks your windshield - some wind blows a large tree branch through a window.

Once they move out, open the windows for a few days and run some fans and the smell will be long gone. 

They are made tongue and groove and simply slide together.

The way we worked it was to offer an open window of dates then the guests who won the week actually had a set time limit to book directly with us.

Assuming you don't need to update the rough plumbing/electrical/HVAC, and depending on the types of contractors you use (but assuming you self-manage), you're probably looking at:- Demo:  $200-500 - Dumpster:  $200-300- Tub/Install:  $600-800- Vanity/Install:  $200-300- Finish Plumbing/Fixtures:  $200-500- Tile/Install:  $500-1500- Toilet/Install:  $200-300- Paint:  $200-300- Flooring:  $200-500In total, that's $2500-5000.Obviously, it will depend on specific materials and the specific contractors, but for mid-range materials and given your location, that's probably a reasonable estimate.Also, you didn't mention new lighting fixtures, new window(s), new door or anything else, so those might be additional costs to consider. 

Upon inspection the tenant still had table, chairs, random junk, tons of clothes, and garbage strung out across the unit, not to mention a broken window and holes in walls where it appears a body was slammed against.