They need to open that door to do that.In person collection may seem tempting but I'm disagreeing on this with you and think it's safety issue when collecting in person. 

I have been handling these myself as it will cost an arm and leg to hire someone to come out and fix trivial things.

Thats an exciting move, be sure to set your rent at arms length with flexibility in case you want to exit either business or building.

I'm in the second year of a 5 year ARM (3.875%) on a deal I did a couple years ago.

If dust wipes every turnover its $200 plus costs on inside and outside for safety to make safe like a few hundred labor for scraping off flaking paint and repainting.

Corey Peterson also has a very easy to use template to get into the larger properties with some safety margins. 

As a safety measure before you can move those machines out of the unit (likely after your tenants leave) would be for an auto shut off valve - some of them are digital and will do it when they sense any sort of leaks. 

The loan I took was fixed for 10 years at 5.35% with an ARM after 10 years at 75% LTV.After 7-8 months of property values increasing and more comparables to support my $120k value I decided to refinance again to get into a fixed 30 yr with a 4.8% interest rate and to pull some equity out of the property.  

not a bad safety buffer as well  

Hopefully it was one of those campaign things he had to say to satisfy he progressive arm of his party.