If you have limited access to historical numbers to base your underwriting off of, then using a determined amount per unit is a safer bet. 

My PM uses Buildium and as a client it's OK.You'll get lots of people chime in about using quickbooks and appfolio as well I bet.

And I’m betting most people won’t.  

I personally took bought these as really long term buy and hold investments and I’m sure betting against appreciation on these.

And I bet @Mindi Rosser would be a great resource to help you find a lender!

Who has the best sports team, what area has the bus stop all the kids walk to etc etc...Understand where these people are working, what the commute is like.

But what I found out with the fridge is that they will make it so painful and draw it out so long that they are betting on the end user getting frustrated and just calling someone else to get it fixed quickly. 

That’s your best bet to meet people to learn from.

It's like any company or sports team; the tone is critically important and it is set at the top.Oh and most importantly as a person evaluating such a group you need to know about track record - you can just google Mark Kenney, he's done thousands of doors.

You can dive right into this market fairly cheap and generally make safe bets here.