Ex: If a tenant calls up to complain that their drain is broken or running slow, or that a light fixture needs replacement, or to spray the Apt with insecticide, or to fix a broken door-lock or window frame, or anything of the like such as the fast repairing, touching up, painting & cleaning needed during a turnover between Tenancies...

Fully under AC, clean rooms for advanced manufacturing, excellent building in every sense of the word, from a tenant perspective. 

Since much of the house would be common areas, you might even consider hiring a cleaning service to go through periodically.

We're interested in a place to live that breaks even with 3 units rented, has some value to add and is relatively clean in an area good for raising kids (no ghetto/near industrial, etc)  We have about 100k of skin.What are some areas worth focusing on?

Over the last 15 years they have really cleaned it up.

I've had my MTR for nearly a year and have had a total of one week of vacancy (Furnishing and cleanings in between). 

put 5k to clean it up and rented out right awayLessons learned?

Additional prior to move-in deposits: Cleaning Deposit $400.

, cleaned, and installed new HVAC, ran all new pex lines/valves/shut offs, all new hardwood flooring and carpet, all new and expanded kitchen cabinets, new appliances, created full bath and connected it to a bedroom to create en suite, repurposed 2 unused rooms (1 into a 4th bedroom/office/playroom and one into a family room, installed new interior and exterior lighting throughout, new automatic garage door, and landscaped.

It needs to be moved cleaned out after the previous tenant.