This is a design I sort of threw together one afternoon thinking about the absolute easiest and cheapest way to make a greenhouse, ideally for farming in cities and favella type environments.
It's just three tripods together in a triangle, wrapped in some ultra cheap plastic such as transparent mulch film, which some farmers throw literally kilometres of away each year.
It's arbitrarily scalable, the one pictured would have a 110 m2 footprint, giving about 320 m2 growing area. It'd also tie in well with aquaponics and similar.
I'll have a look at getting a working group together here in Perth, leave most of the work with them while I get on with the solar thing.
It'll largely come down to what land can be found, but as the thing will be somewhat moveable, getting kicked out won't be such a big issue.
Updates on this will appear on http://urbangreenhouse.blogspot.com/