How do you more seasoned investors go about getting comparable sales data for a potential off market deal? 

They are a great resource at a reasonable price comparatively.

I don't think of it as we do traditional real estate in terms of "out of state" markets.

Does the IRS lien make it difficult to get immediate financing for both traditional financing as well as hard money?

At a very minimum buy your own crummy router instead of paying for theirs over again every year.you can also try adjusting the wifi to use a different channel. search the app store / play store on your phone for wifi analyzer. connect your phone to the wifi analyzer and it will show you the relative strength of your network compared to others in the area causing interference.

Although the average of these 2 areas is around $950, you will clearly be getting very different rents in each of them.The more specific an area (and similar the properties) you can look at to compare rents, the better your estimate will be.

Upper Kensington comparing to "rest" Kensington and Philly generalI have difficulty finding a tenant to an Upper Kensington home that is well maintained (new wood floor etc) and furnished.

I'm not sure how helpful a traditional market study will be.

@Brook RiemanI think you need to run the numbers and compare to another investment types..

What is the best option for us since we will not qualify for the traditional purchase with using credit score?