It took me a few years to become a "selling machine".

I asked him to run the washing machine, nothing…As I am under the house waiting on the washer to do its thing I was talking to him through the ventilation vent and he says "I detail a few cars on the side each month maybe 5-7, but that can't be the reason my water bill is so high…" Right then I become extremely pissed because thats got to be the reason…Your running a car detailing business.

And ontop of all of that the washing machine drain is jacked up and the brand new mixrowave is not working right.

You probably don't want somebody renting it for band practice, or running a chopper shop, but maybe you're okay with a guy that fixes sewing machines... 

if laundromat aint walking distance i'd probably invest in-unit or a share laundry room on premise.when laundromat is walking distance i avoid the added maintenance for either washer dryer hookups or providing the machines.

off topic: in one of my buildings (88 units) i bought a key machine and my onsite manager make extra keys. 

Treat it like a washing machine.

@Ginny WatsonYou may want to try an ozone machine as well.

But in March the upstairs tenant calls us again and says that her washing machine is not working.

The Japanese are awesome at creating a lean mean machine for every type of company out there.