One of my protégés did all finish work (flooring, painting, light fixtures, plumbing fixtures, outlets/switches, sink drains, dishwasher, shower, bath vanity, kitchen cabinets and counters (installed but he did cut), etc.  

It's the same painting...you just needed a different frame.

Very common for old wooden windows to have many years of paint on them sealing them shut.

Paint the tiles and paint the fiberglass where the tub is.- Do a minimal remodel, replace toilet and vanity.Note: I am trying to get the best ROI.

Sanding helps the primer and paint bond. 

I am painting an ugly picture for a reason, if you are not in it for the right reasons, you will probably get ground down quickly. 

Carpet, flooring, paint, fixtures, landscaping.

There’s an observed increase in sales volumes and a moderate appreciation in house prices, coupled with a significant interest in affordable housing in the search data.Opt for cost-effective updates that improve structural integrity and aesthetic appeal, such as new fixtures, fresh paint, and updated kitchens and bathrooms.

After determining and correcting the source of the excess moisture paint using a coat of Killz in that room as a primer. 

We do complete kitchen and bath renovations and re-designs often down to the studs which far exceeds a typical turnover renovation where you'd maybe do minor repairs, paint and lay floor.I think I could probably manage 200+ units using Buildium property management software (or some other full featured app) without breaking a sweat.