I might be worried about how close Evanston is to Libertyville. There's a great homebrew store up there called Perfect Brewing. They're about a minute off of I-94, and only a few exits up from Evanston/Skokie. That said, if you are closer to the lake and Northwestern, you should have a good basis for customers.
I would think about establishing and/or pairing up with a local homebrew club, and teaching a bunch of the students how to brew on a semi-regular basis if you go with Evanston.
You should give PB a try, regardless. They share space with a local woodworker, and often have carvings and furniture for sale in the same showroom as all the brewing ingredients.