I tend to grow bush beans and cucumbers so no need to trellis. Though I'll admit pole beans outproduce bush, and cukes on a trellis take up less room.
I used a fifty foot welded wire fence for yrs for peas, place fence on the side the sun so they grow into it. Put it on the other side first yr and had to keep pulling them back... Peas you can pick relatively easy with the fence cause they don't grow to where you can't pick the entire plant. When their dead and dry easy to remove and clean up fence. Tomatoes on the other hand, mistake. Supported them great, easier than cages or stakes, until it came to picking and I had to cut holes along the entire fence to get to the backside of the plants tomatoes cause they grew so massive you couldn't reach from the other side. The peas I've just been using fence posts now and running string as they grow. Used jute twine last yr thinking I wouldn't have to clean it up, just rot and mulch in, stuff sagged too much every time it rained. Another mistake I made with the peas was using those cheap metal T-posts with the wire fence, 50'x4' row of thick planted peas makes a nice sail apparently and ended up bending all the posts over to the ground after a night of heavy wind gusts, ripping half the roots out to boot...
Last yr I inoculated kidney beans and white navy beans (both bought at the dollar store the big bags of dry beans you eat, they grow great! and a dollar a pound!) and planted them right with my rows of corn to give the corn a boost of natural nitrogen. They are really not much of a climbing beans though, grew good but think I'll go with a better more vigorous climber this yr. Hoping to get my hands on some Haudenosaunee skunk beans, they are ideal for that purpose and native to our area, a little expensive though.