Thing is, this house was poorly remediated, they didn't cut high enough or even let all the furniture, belongs, etc. to air out.

When I glance up at the balconies of each finished or soon-to-be finished building, I frequently see that two thirds or more appear empty (while the others have outdoor furniture, bikes, etc on them). 

I look at properties all the time and I see the condition of many properties around here that are "professionally" managed where the repairs are unbelievably shoddy, the cheapest indoor/outdoor carpet is used for flooring, they often have galvanized plumbing, and still have sections of knob and tube electrical. 

I think for the most part, these appliances are thought of as furniture and not part of the house On the other hand, kitchens, lighting, furniture, and washing machines do not have to be counted in the property transfer tax or Grunderwerbsteuer when closing on a property!

would I leave all my high end furniture ?  

We didn't have a final walk-through because he left town (he won't be moving across the street for a few weeks).In addition to leaving a big ugly mess (including rocks and turtle crap in the bathtub, which i mention only because it's original) and leaving behind huge furniture in this third-floor apartment, there are two much bigger deals:1) I believe he has sabotaged the plumbing.

I plan on renting out the bedrooms in a 4/2.5 SFH.1) Would it be a good idea for me to furnish the rooms or do most people bring all their own furniture?

Linens/furniture would go in its own bucket as furnishings and be written off a different way.

. - doesn't jiveshe arrived to see the property in an Uber, a small compact car with her 3 big kids she owns a 2012 Toyota, that's ither furniture didn't look very nice, cheap, and hardly any, she has boxes of junk though.she let me know she was going to do the landscape (pick weeds), - how many people making that much money are out there picking weeds, btw, weeds still there.

Also the furniture in the apartment they rented from a furniture rental company..never paid them a dime..it was my pleasure to open the door and let the company repossess what was rightfully theirs.