I caveat the "unless you have to" because I was also working on, and paying for, renovations in the house I lived in and didn't have the cash at the time to float two mortgages, install two kitchens, two bathrooms, etc.  2. 

I don't know what it is with tenants and screens (do they all attend a 'how to not treat or properly install screens' class?)

They've rewired the electrical and installed new smoke and fire detectors.  

If those locks are still in good shape, just install them at the next address.I went to college to, and it is not mandatory, and I got a business degree that emphasized real estate.  

Chris Mason  manufactures of Of these units by ALL means made multi family duplex units I have bought and installed many .. in Oakland no less.as long as they are affixed to a Permanent   foundation and removed from the motor vehicle registration they are considered stick built homes..

You are doing an installment sale but at no profit.  

I bought 3 homes (2 in Rochester, 1 in Brighton), that only needed me to change the locks and install smoke detectors (and a few more minor stuff).

These workers will be able to do some tasks on their own without the guidance of a licensed contractor, such as installing flooring, cabinets, countertops and fixtures, landscaping, texturing, painting and doing patching work or light repairs.

What type of roof is currently installed and what is the condition?

I put in a cash offer today on a sfr rental foreclosure where the boiler and all the pipes froze. Plumber took a look and suggested it would be a good time to switch over to gas forced air furnace. I didn't have time ...