They provide the machines, fix them when they break, and you have 0 money out of profit.

While we were there their phone would not stop ringing, they had one of those answering machines where you could hear the message.

Since adding a new hook-up on the second floor cost a lot, I was thinking of adding a new set in the basement, then how should I let tenant only use their assigned machines?

Fannie Mae requires the following versions of the classic FICO score for both DU and manually underwritten mortgage loans:Equifax Beacon® 5.0;Experian®/Fair Isaac Risk Model V2SM; andTransUnion FICO® Risk Score, Classic 04These scores listed above are not provided by Credit Karma or any other free service.Credit Wise should tell you why your score changed, but maybe it didn't actually change because the way the score is calculated is completely different than your lender's score.  

I like@John Underwood‘s solution of using high-capacity machines to expedite laundry time.

I'll look through and find a picture on my home machine and update my profile.

I actually did an ozone machine first, then removed carpet and pad, treated the floor with special enzyme cleaner.

Biggerpockets is such a machine now and while there is lots of useful advice, it's primarily aimed at newbies (who can't use the search function mind you).

Some no-brainers is to have a fax machine and a reliable number to be reached at.

Become a marketing machine as well.