fixer-upper

noun3

1. •
   (US, informal) A house, property, car, or other object that needs to be fixed up or repaired, often purchased as an investment.

   • 2003, Jay P. DeCima, Investing in Fixer-Uppers: A Complete Guide to Buying Low, Fixing Smart, Adding Value, and Selling (or Renting) High, McGraw-Hill Professional, →ISBN. — 2003
2. •
   (informal) A potential romantic partner who may need some motivation to improve their personality or habits.

   • Don't be seduced into a relationship with someone who seems to be a "fixer-upper." Attempts at renovating people usually fail. — 2000
3. •
   (informal) A person who tinkers or fixes things up; in particular, someone who fixes up houses, properties, etc. as an investment.