Hi Tom, mostly a shop to finish resto, then storage for the winter. I have to put lawn equip stuff in there too because I house that in a shed and I cant have 2 "accessory" buildings. I'm thinking 20x20 too. I did consider a cantilever extension also, but it woukd have to be dirt floor as it woukd be considered part of sq ft if I did a concrete floor. $ was a factor too. I appreciate your feedback. I'll look into those shop sites also. PT