Also the majority of those costs to covnert to a 2nd unit will need to be capitalized and depreciated, but some things (new appliances, flooring, paint, kitchen cabinets) can be shorter year assets vs. across the full 27.5 and IF it turns out that unit is > 50% you can use bonus as well on those items.

It needs everything: all appliances, cabinets, flooring, tiling... everything.

Important things to check include opening and closing every cabinet, looking under sinks, pushing on doors and cabinets, and checking commonly used areas.

Said I wasn't allowed to have a glass window in my old back door. so I covered it in cabinet grade plywood and trimmed it out to make it look as good as possible.

I can see cobwebs in a corner, dirt on the baseboards, cabinets that haven't been wiped down, etc.

Purchased it for $65,000.00 and replaced the plumbing, floors, cabinets, and painted for 18k.

You find the house completely trashed with missing appliances and cabinets, tenants were cooking meth, windows broken, etc. 6-8 months of unpaid rent, unpaid utilities, thousands to empty the abandoned property and trash, $50,000 to completely renovate the property and make it rentable again, plus all the time, energy, and stress along the way.I would actually argue this is pretty common and not even the worst-case scenario. 

Much of the work that was done had to be redone, especially due to stolen wiring, cabinets, etc.

.: Quote from @Mark Frattini: @James Heller For rental grade cabinets check out H cabinets in Miramar.Call San Diego Flooring Pros or La Mesa Flooring for LVP.Ecotech Windows & Doors for windows.

Paint some cabinets.