nice. If you want to have it cheap, then something like these is o.k.
http://www.mdmshelters.com/
Have the same problem, too many days on weekends raining and cannot work on the cars, or too hot now in summer. Just need something which protects from weather.
Got one from COSTCO for about $500, 6 x 4 meters, with plastic window, a front 'door', some air circulation openings, rigid steel frame. Something similar to what COSTCO USA is selling here, but probably a bit smaller and the cover material is less thick
http://www.costco.ca/Common/Search.a...N=0&lang=en-CA

My buddy has a nice big garage with a pit, airtools, aircondition,wheel balancing machine, tire changer and and all the other goodies we are dreaming of. But I do not want to bother him too much, so that is the cheapest solution to survive bad weather. Maybe in winter I install a small portable gas stove.
http://www.costco.ca/Common/Search.a...N=0&lang=en-CA