If you go this route, I would target homes that have units for rent that are being self managed. 

@Drew Wiard  What does your target property look like?

Now if we're talking about targeting military, specifically the Air Force, I would recommend AHRN.com. 

I am interested in the psychology behind this and if I need to consider my target audience differently.

Is Quicken a good resource for investment homes or should i be looking into other companies that target investors?

If I'm going to buy a house retail then I might as well get it off the MLS and get a rehab job targeted at an owner occupant.

Then learn everything/become very in tuned to your target area relative to rents, condition of properties, sales prices ect as you are the only one that can make yourself successful.

So the all in may not need to be as high.This is where if you did it yourself (setting up your own deals) you could probably get to the equivalent cash flow target "cheaper" as you can use leverage so you don't need the full $1.2M of your own money to deploy. 

If you target 70% it leaves you a 5% buffer encase the appraisal is lower than expected or your Rehab costs are more.  

Direct mail is still #1 in my opinion but internet marketing and social media are catching up. you should expect a 1-3% response route, but it is possible to send out 500+ and get a good response if you're list is very targeted.