This was a pretty big job, adding some walls, a bathroom, a kitchen...

Can I just scrape and recover with a different color?

I have a house I plan on rehabbing and the roof color doesn't go well with the rest of the house.  

Suddenly, by remote control, appeared giant color slides showing the state capital building and the projected housing appreciation numbers for the entire Sacramento area. 

Yesterday I went to get Allure at HD for a property I'm getting ready, no problem on the cherry plank, bye the Ahlar I use in kitchens and baths is out and was told its discontinued along with Corfu, the Sedona color was still current, but I don't like the look as much.

Like the radiators, but they take up a lot of room and one is in the middle of a wall I want to remove. 

Each room gets a thing mounted on the wall.

You join the spreadsheet (table) to a geometry (property boundary, blocks, etc), then you visualize the data with a logical color scheme.

Between that and personal service as @Michael Boyer mentions, paint colors inside, etc, it is pretty easy to differentiate yourself from the big management co's.  

For the exterior the big expenses is that they will require wood windows (at least on the front) along with half round gutters and clapboard siding, brick, or masonry covered walls.