This sounds like the way to go. I have an old 20 gallon tank with a filter and air pump. Now all I need to do is find where to buy my minnows and I will be all set.
Bowhunter,
Jenkins Wholesale bait in Rochester is where I buy mine but that might be out of the way for you. They are about 8.50 pr pound for "chubs" or "tuffies" as some folks call them.