Of course, I still get tenants who are barely making ends meet as it is and they can’t afford the increased rent, whether it’s 30 days from now or a year from now.

There's no easy way but you can use property management software to help you keep track of them.At a bare minimum, you can create a form that lists each property and each utility bill.

When doing the research at 10% down for a 400k to 500k townhome and given HOA, taxes, and other things the occupancy rate must at least be 70 percent to make this even worth it unless I'd be barely breaking even.

I found Bigger Pockets about 18 months ago and devoured so much information yet have barely scratched the surface.

Interesting points raised in the comments section include: the strength and diversity of the region's economyGreat Recession of '08 barely made a dent in metro Denver housing prices and they recovered quicklythe disparity in prices between CO and the states where the influx of people keep coming from is too highWith regards to Fort Collins specifically, I would be tempted to add: the continuing expansion of CSU.

With one unit things are either great (and you barely notice) or HORRIBLE (and you can't think of anything else).

Pink, orange, and baby blue?

My favor part is  South Lawndale by Pink line Central Park station. 

Finally, a trustee bared her for 180 days.  

I don't know what your experience has been but I've had quite a few people talk to me about agents in our market that just do the bare minimum and once they get their commission they never hear from them again.