What to do with an original unit

[Jon L.]

I'm new to this site! 

I manage 15 units and all of them are mostly original. Rents are at market prices and we still increase $50-100 per door, per year. No one has moved out in 4 years and no one is planning on it.

Sooner or later someone will, and since most everything is original(1965), I'm looking to redo everything. Each unit is about 750 sq feet, 1-2 bedrooms, while the family room and dining area total about 450 sq ft! 

I'm thinking of putting tile everywhere downstairs, and in bathrooms and kitchens upstairs. Upstairs will have carpet tiles or laminate flooring in non wet areas. 

The kitchens are currently 12 ft, by 8 ft, by 6 ft, which I think is pretty big. These tenants are mostly low income tenants. I'm thinking of making it an 8x8, L shaped kitchen since they only currently use 25% of their cabinets. I'm thinking of putting granite on solid plywood cabinets. 

I'll scrape ceilings, put in LED lights, and ceiling fans in bedrooms and family rooms. 

Bathroom vanities are currently 6 feet long(again, way too big). I'm thinking of re-tiling and putting in a 30-36 inch vanity. Showers are all cast iron tubs so I'll re-tile the shower surround, then professionally spray the cast iron tubs.

The whole building has been re-roofed with a TPO roof and all windows have been upgraded to dual pane vinyl windows. 

Each unit has a wall heater that's original. I don't know much about these but want to replace them.  

How does this sound and do you have any advice?

Thank you all and best of luck to everyone!