Using Google and looking at reviews should help you narrow it down. 

I know cost of living is lower than CO, I know the class b and c areas.

My area has a, b and c class properties as do all areas.  

Specifying your requirements will enable you to focus on homes that meet your objectives and help you narrow down your search.Finding the ideal property may be made easier by using a variety of sources, including direct mail campaigns, real estate brokers, wholesalers, networking events, and internet listings.

If you're really just getting started and you are trying to narrow down a list of potential markets, there are numerous publications that provide reports on everything from employment to housing to trends to major changes within cities, etc.

Once you find a general market, you can narrow your search further by looking at crime rates, school rankings, etc. 

Once you know what to look for in terms of an investment in your market then you can start speaking with lenders about using that 20k to determine what you can afford and then move into actually narrowing down properties and making offers!

Thanks for the idea, however, I failed to mention that one of the window wells is along the side of a narrow driveway, thus anything built up around the well could get in the way of vehicles trying to use the driveway.

Personally I have my applicants fill out an application and pre-screen them before narrowing down to a short list before only running an actual background check on the first and possibly the second runner up in line for the unit.

This is a very narrow ask.What carrier?