We would really like a greenhouse, but we only have a small garden so would be limited to about 6'x6' in quite an inconvenient location. We're full south facing so it would only be used during the winter before it turns into an oven.
I'm starting to think to think a garden igloo/geodetic dome in the middle of the garden during the winter might be a better solution. We can put the furniture in it to use as a garden room and keep many more and larger plants in there (they're 2.5m diameter), then fold it down and store it in the garage over the summer. They're also about a third of the price of a greenhouse!
Does anyone have one? Are they as marvellous as claimed? Do you think they'd survive going up and down each year? And are they actually warm enough to sit out in?