I'm not sure if this would fold up as tight as those fences if there were springs attached, also it'd be quite tall/wide as it would only fold in 1 direction but it could be lighter if something other than wood could cover it, if you had a free wall and could get permission you could maybe attach one side to a wall and the just pull it out like pulling out a sofa bed, although I guess most people want a portable one. :(
my teams issue is we have a sprung floor but it's the one from the London Olympics so the gym owner promptly banned us from wearing trainers to protect it (he cleans it by hand he's that protective although I can see why) so we no longer stunt in trainers apart from on a small area of none sprung floor one stunt group at a time. but it's such an amazing gym nowhere else could compare so we're stuck :(
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