In my past experience with growing industrial sized tomato plants I need oversized tomato cages, so I use concrete mesh to grow my tomatoes, but I cut some a little too long, so now I have 2 tomato cages that have a circumference of 6'. Will these work to support tomatoes? For the type of tomato cage think of the ones made out of concrete mesh.
Yes, it should work. I would in any case put two/three poles (or more if you are in a windy/stormy place). For the weight, it is not a problem.
I just do no like that you cannot enter in the center, and you will (I think) have difficult to reach it with hands, but it depends on the mesh type.
In my opinion, linear is often much better, for space efficiency, for watering.
Personally, I do no like cages for tomatoes. I prefer a pole (with maybe some extra bamboo): you can move branches easily, without breaking.