I've looked at these myself but they didn't work out much cheaper than the solid Galv panels. Not sure how it would work out building your own. But I think I'm going down the solid panel route next with bar dividers and bar front gates. Small wooden kennel inside or a plastic barrel and a decent roof...
gaz that's similar to what I'm doing only a block of 4 runs- 4ft x4ft each for my terriers-solid dividing partions and mesh door fronts-comes in at just under 700 notes for metalwork then got to put a roof on it,that's around another 100/150-they will have 30 l blue plastic barrels filled with