...I think I will be designing channels between some rows of the pavers and putting in some decorative rock on top of the barrier...
The radial wires don't need to be very large.
#22 magnet wire can be stuffed into a crack between
two pavers and have barely space for a couple grains
of sand. But wider gaps will be OK, too.
Best thing we did with tomatoes was to make a hedge
with large mesh game fencing stretched between rows
of T-posts, with the two sides about 14" apart. We put
the plants every 12" down the row. As they got higher
we slipped dowels, sticks, or similar between the two
sides to support the branches.
Air flow through the hedge reduced problems with rot
and mildew. We could reach the tomatoes through the
game fencing to pick them (except a few very large
ones that we had to cut into pieces). Fencing kept the
deer from eating the plants (except an occasional nibble
on the branches that we hadn't tucked back into the
hedge yet). And a single soaker hose down the center
would water the whole thing. At one point we had
at least 4 hedges, each 50' long.
I'm sure with a bit of creativity you could build a frame
to support it that just sat on the pavers and didn't need
to sink into the ground... but that is a bit off topic.