My primary question I seek to have answered by posting this post is fairly straight forward, yet I encourage debate concerning metrics and comparisons.  

Any idea on cost comparison or up charge for the service?

Obviously it depends on the region, but also evaluate the neighborhood, quality, future capex, etc.the comparison to stock PE ratios by @Bart H. was a very interesting point (on page 2 if you haven't seen it, I recommend taking a look)ultimately, identify your strategy and see how the 1% (or any other) rule appliesThe bottom line for me is I need to spend more time analyzing deals to figure out what's right for what I'm trying to do.

I've had good luck with BankNewport as well, to do rate comparison you can also try to get competitive quotes from other local banks that hold onto their loans, such as Pawtucket Credit Union, Navigant Credit Union and Coastway (now HarborOne).Other than the rate being a little higher because of it being 4 units and non owner occupied, is there a reason this would be hard to find @Hunter Waterman - have you had difficulty getting such a loan (HELOC)?

The 1% rule is not a meaningful metric and is only helpful when doing a comparison of properties with similar costs and operating expenses. 

And In Pasadena and Severna Park there are not many vacant lot transactions to make a comparison .

Median income can be used several ways but one way would be in comparison to average rents.

When people say they "bought a foreclosure" they could mean they won the bid at the auction, or they could have bought the house from the owner before it actually went to auction.Foreclosure sequence, timing and laws vary from state to state.Always get a title report and use escrow.

@Ihuoma Johnston comparison and review forums are coming up with very mixed results on the Arsenal MKG software.

MSA data is great for macroeconomic analysis and comparison but I wouldn't rely on it to make investment decisions.