If you are not building to big you may be interested in the sips panels, I don't know how well they will work for your climate, If you want to side like your house, and shingle to match, they are pretty sweet and extremely well insulated. http://www.premiersips.com/
Here is the one that I purchased for a 30x30 brick building,http://www.northerntool.com/shop/too...6428_200316428 It is 220 volt, I live in wyoming so the temps are quite often 20 at night average, that is before we get the cold weather, If you have a good insulated building and just run it on the weekends I would say it will cost you 100 bucks a month just for power, I tried to keep it above 30 and then had wood stove and It was running up to 200.00 a month, I think the little omish box heaters are pretty good and run off of 110 volt. I would probably look at one of them for the size building you have. good luck
That's the one i have been looking at. Seems to have good reviews. I just want to keep it around 50 all the time, then turn it up when Im out there.
__________________
RobS
71 Demon, AlterK - 4 link GenIII hemi conversion
66 Rambler Classic Wagon, LS conversion -Scott's IFS/4bar-bagged
Check out Carolina Carports, they have an estimator on their site that allows you to build a building to your specs and get a price right online as you build. The erection of the building is included in the price.
__________________ Steve Hayes
"Dust Off"
68 Camaro
Speed has never killed anyone. Suddenly becoming stationary, that's what gets you! "Jeremy Clarkson"