Have a "similar" home made one that is darn handy. Used an aluminum tool box up front for pliers, nails, chain saw, stretchers, with about 4ft behind an open deck for posts, wire, etc and behind that 3 uprights for unspooling wire. Wished I had done it years ago, tool box keeps weather out so things are always ready to go. Onto the quad and happy fencing!
Certainly doesn't look as fancy, but fills my fencing needs.