Hello. I'll give my opinion. If your just doing 1 plant in a tent then use a trellis. You can get around, under it, to check for problems.
But, I don't like the restriction of not being able to move plants if I need to, if I find problems in that area like pests or mold.
I prefer to use tomato cages. I can spread them out and make mainlines and the cages provide support to tie the big buds to, and I can move them if there is a problem.
It makes it easy to take out the plants for cleanup and harvest, or to water, or clean up a spill when the tent is full.
In my 10x10 tent I have in the greenhouse, I use a trellis, but I can walk completely around the table and not be restricted by the net.
Hope that helps. You can peek at my diaries to see what I mean, if that would help.
Later. Chuck.