Countertops and cabinet hardware go a long way and pair well with stainless steel appliances.

Restored all of the main floor hardwood floors, removed walls, reconfigured bedrooms/closets, brought laundry facilities to main floor, all new kitchen, new lighting, new HVAC, new roof, new windows, all new doors/trim/hardware.

It's called NOT Your How-to Guide to Real Estate Investing: Life Lessons on Hacking Your Mind Before You Hack Your Wallet.

The hardware has been updated in the last 10 years (HVAC, hot water heater, roof) and it's got good bones and seemingly good tenants installed. 

Yeah, I'm currently renting with my close friends for 300$ a month, so its not incredibly hard on my wallet.

New craftsman-style doors and hardware.

New craftsman-style doors and hardware.

These are pretty cheap, easily available at every big box hardware store, and an experienced carpenter can install them in a day or two. 

Lower unit was occupied but upper unit was vacant, so we went right to work painting, installing new floors throughout the entire unit, replacing light fixtures, cabinet hardware, and addressing general maintenance issues.

When I act as general contractor on my own local projects, I will purchase the major items direct like the cabinets, countertops, fixtures, flooring, doors & hardware, paint, etc. and have it all stored at the property ready to go.