It sounds like you've already made up your mind with sticking to the LTR market, and if you're cash flowing with processes already in place, I'd just recommend continuing that machine!

The most common expensive things are water damage from washing machine hose breaks and leaks, facets that fail, clogged toilets flooding, sinks backing up and things like that.

I also had a vending company using some warehouse space to store vending machines.   

I went in like a machine when I had to remove tenants and while I am very "friendly" with "my" tenants I am not friends with them.

It's been eons since I shopped for a dishwasher, and never for a rental yet, but given the unit which needs the machine isn't super high-end, I'm leaning towards the 400-500 price point (quality/value/reliability).

One shower, a washing machine, no dishwasher. 

Some companies will place machines on your property and you get a percentage.

Anyone using  a key cutting  machine to keep costs and time down? 

Though I'm a licensed real estate agent, in southern CA there are some REALLY well established offices that work the high end listings, and have their marketing down like a well oiled machine.

As a real estate investor and attorney, who already had a custom operating agreement for my business, I immediately saw the value and purchased the LLC Master Machine after the event.Also, to put the price point in perspective, I usually charge ~$2,000 for an entity organization/incorporation and the accompanying governing documents.