I have just bought a winter cover for my (under construction) 33ft fin keel yacht.
In B&Q they were selling a Gabizo at a out of season discount.
The complete thing is 9 metres long and will easily be extended to the necessary 10 metres. It came complete with about 100 interconnectable poles, corner mouldings, guy ropes, pegs, feet and all the covers.
I could not have purchased the necessary timber and a tarpaulen for anything like the £80 it cost me.
Of course it states that it will not withstand high winds and snow but I am prepared to take the risk.