Adding coin (or some pay to use) laundry at small multis

[Pat Jackson]

I know this question has been asked before. I'm convinced it's worth it.  Here are my questions.

When adding coin laundry to small multis (I'm really talking 4-plexes), how is:

1. Rentability impacted? I know I wouldn't want to live some place where I had to drive to do laundry.  Honestly I don't want to live anywhere that doesn't have laundry in the unit, but I've never lived in a multi unit.
2. Does anyone believe this justifies raising rents?  I'm not trying to squeeze blood out of a turnip, I'm thinking $10-$15 a month a unit.
3. I have heard of companies that install their units and maintain them.  The utilities are up to the owner, and once a month they receive a check for part of the funds.  Does anyone have such a company they recommend, especially in the Kansas City area?  I've heard they exist but can't seem to find them online.  Perhaps I'm not doing the proper word search.