EDIT 13/6/11 - I've subsequently managed to aquire a second one, identical to the first for only £40 (incl P&P), as detailed on post #27 of this thread. If I had a garden large enough to accomodate a full size polytunnel, that would have been my first choice, but a small patio, shed, garage, greenhouse, chicken run and a small patch of grass take up my entire garden. As it has to be on my rented land, I've opted for the cheapest possible polytunnel, despite reviews about them falling apart in a strong wind. So, as my Xmas present (that I had to pay for myself) I bought this: And when I erected it in my garden I immediately thought this will blow apart in the slightest of winds. So I started working out how it could be strengthened and braced using all the free materials I've gathered, such as scrapped decking & joists, timber from skips (roof conversions are a good source), and pallet slats. Tubular bracing will come from paddling pool frames, scrapped tent poles from camp sites, garden gazebos, kiddies climbing frames, etc. Even the small amount of concrete required has been purchased cheaply: The first trial erection (with cover on) revealed it was actually 4.445 x 1.9m: which has enabled the remainder of the support posts to be driven in, and all the other supports (which will allow replacement of zipped doors with hinged doors) and staging (slats from a village business's packaging), etc. will be completed shortly.