My thoughts: 1) I don't know how much it weighs, but, regardless, lifting it from the 4 corners could easily wrack the frame and/or cause joints to break or pop apart, and the panels to pop out. Personally, I wouldn't risk it. Instead, I'd grit my teeth and spend the time needed to (at least partially) disassemble it, and then reassemble it at the new location. 2) For a greenhouse this size, that one, good-size vent window is probably adequate, but many of us use a fan to move the air around anyway. I suppose you could add another window as I suspect the manufacturer (Rion) would probably sell you the parts, but that could be a little pricey. 3) Possible concerns about having it on asphalt could be: the smell on a really hot day inside the greenhouse, and no drainage from spills. It's also usually a good idea to tether down a gtrrnhouse foundation some way in case of a violent windstorm, so you might want to figure out how to secure the base to the asphalt. 4) As far as buyer beware, I suspect you don't have to worry, given that Costco has a generous return policy, even on things like this. As I mentioned in my first post, I'm not associated with Costco, but I am a satisfied customer. I bought a different model greenhouse from them 3 years ago and have been very happy with it...and the price was about 1/2 of what I'd seen for the same model elsewhere.

The Miele Warehouse is currently holding their warehouse sale. Thursday, November 17 to Sunday, November 20, 2011. They say prices are "up to" 50% off. I purchased an "A" grade Optima DW (that was a display only model in mint condition) for 40% off retail. I do think prices are higher in Canada to begin with though. Look at the Miele Canada site as they post prices which are the same anywhere you buy Miele (no discounts unless through Miele). http://www.miele.ca/miele/home.asp Here is a link that might be useful: Miele Unboxed Warehouse Sale - Canada

Well, it looks like a pretty good deal - the roses are definitely hardy - I have the 3 varieties they are recommending for Alberta and they are good, dependable performers throughout the whole growing season - if I had more garden space I would probably go for it!

There are very few varieties of plants that survive in this ocean environment- mostly pine, spruce and rhododendrons. Have a few roses. May to late Sept is OK for plumeria, citrus that I have, but the wind still can blow 40mph. Everything needs to be under the lights in my indoor greenhouse Oct-Apr. We occasionally get a tree down, broken windows, but the excitement of watching storms blow in and waves crashing on the rocks outweighs everything else. Have loved it here for 20 years but born and lived to advanced adulthood in southern Californian- loved the growing environment but got sick of the heat. You have the touch. Never seen anything like what you accomplish where you live. I hope you keep posting pics as spring approaches. It's amazing and gorgeous.