If your duplex has some used appliances (range, refrigerator, dishwasher, washer, dryer) you could break out the thrift shop value out from the cost of your dwelling structure, and depreciate those over five years or until they are replaced, but, the thrift shop value of used appliances is usually not worth the time and expense of a cost segregation study.

That means new approved windows, doors, energy efficient AC/Heat, refrigerator and stove etc.

I use black refrigerators because they get touched 20 times a day, add in some half stainless half black stove, dw, micro and your house still looks great.I was just giving a general answer without considering your 2k/month rent

I am thinking Diswasher and Refrigerator are standard appliances in a rental.

Appliances - I feel like I should just buy an appliance store for all of the washer, dryers, dishwashers, ovens and refrigerators that I've had to replace 2.

One day your water heater, furnace, refrigerator, etc will stop working.

Soap needs to be refilled, toilet paper replaced, the refrigerator cleaned out, etc.

Depends on what this person actually does,, our turns were 24 hour turns out at noon in at noon next day.. we gave caretakers like 135.00 for 1 br,, 150 for 2br and studio was 100. we had painter separate, carpet cleaner separate, and maintenance guy was separate.. we had 120 unit complex and my caretakers were anxious to get any turn they could.. so between 2 or 3 of them we could do 10 to 12 turns a month.. we supplied all the cleaning supplies. they did stoves, refrigerators, all windows, tubs, sinks, all light fixtures, and washed hard surface floors in kit , bath. 3 to 4 days is WOW  cheaper to hire merry maids.. and get it done quicker..Get some additonal people lined up to help and set the pace.. and rate.. if this person can't get it done faster then you need someone else to do turns and maybe this guy can do something else more productive.. 

Or 'I am a food addict, I need you to provide me with three refrigerators.'

After they moved out, it took a lot work to clean the place: pet hair was everywhere, including in the refrigerator!