The agent set me up with an MLS search and I frequented it daily looking for deals.

Most of the time, bouncing your money around in any investment game is folly, as you frequently lose the edges (fees, taxes, whatever), and the edges is what increases the overall size of the thing. 

I'm just looking for investors that may use this strategy frequently. 

I know the area pretty well and often frequent the area.

In some cases the message could be the same, but knowing your potential audience can make or break a mailing campaign.While I agree with @Braden Smith that his market sounds saturated with yellow letters, I would advise you to start paying attention to your mail and see if it appears your market is saturated as well.

I am currently having a non payment of rent issue with one of my tenants. I have been fortunate to have impressive feedback from other landlords/property managers on the forums of mrlandlord.com and masslandlord.net. ...

To name a few, foreclosure rate is higher, harder to attract quality tenants(it takes me average 2 months to find a qualified tenant to fill an vacancy), township inspections are more frequent(once every other year for rental) and code requirements are higher.

We frequently can wear shorts and flip-flops in January.That's the good news.

All depends on your strategy. 8-16 units come online once in a blue moon. 2-4 units are there pretty frequently.

So tenants frequently were late on payments, or didn't take care of the place.