On the plus side, it looks like there are several ideal spots to get a good shooting range together (unless CCNRs prohibit.) Is the barn paved? I don't see you as a horseman so that there is a good sized shop...
More importantly, have you talked to this realtor? The reason I ask is I almost bought a property online (from a distance like you are doing) got up there and went "No, hell no." I then started talking to the realty agent, letting her know what I wanted, what I was going to pay, that kinda thing. She helped me find a place that met my needs really quick in a tight market. (Its now my rental.) It looks like this company does WY and SD, so they should have a good grip on what is coming to market, what to avoid, etc. The internet gives us a feeling that we can do it ourselves, but having an agent, especially with that much distance, really helps.