I have needed extra garden storage for the kids bikes for ages now, as our shed is just too small.
I had the room for another shed but couldn't afford to buy one.
Finally, I found cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200593639347&ssPageName=STRK:MEWNX:IT and it is fab. It took me half an hour to put up all on my own, and have easily secured it to our fence.
It says it will fit two adult bikes. I have fitted those plus ds's smaller bike in there and finally our garden looks slightly more tidy and the kids bikes will stop going rusty.
Just thought i'd share incase anyone else was looking for something similar.