I've cut windows out of wire fencing for a tomato cage. Be sure to bend back the cut end so it doesn't scratch you. I'd still find there'd be a tomato that's hard to reach. Make lots of windows, I guess.

I've also made stakes out of privet or other brush and tied sticks between them with wire. Or used old lumber. I once had a "cage" that was 7' high, 8' long, and about 3' across. There were tomatoes all up and down it. After half a dozen years it started to get too rotted.