Hi Tim
For the Sungolds, I used a system of plastic coated metal poles with snap-on horizontal stiffeners I got at Wally World last year. The poles are 6 feet long and come in groups of three, and there are enough stiffeners to space them 2 feet apart. I really needed something tall, Lol! The packet said they'd grow to 7 or 8 feet tall, and they would have if I'd given them long enough support. As it was, I cut the primaries when they got to 6 feet tall. The Tomatillos and slicing tomatoes will go into wire cages made from the heavy gauge wire mesh used in concrete.
I've always had a hard time supporting once they are loaded with fruit. I saw this one guy who would just let his tomatoes flop over on the ground and would let them grow that way. They would eventually take root similar to a water melon and keep growing.
Post some pics once your rig is up.