Taz

What I would of suggested to do is put in posts (4x4s) on either end and have wire lines running from the posts. Plant some hedging (find the best one for your soil and position of the sun) near each of the posts and wind the growth around these wire lines. Trim/shape them as they run along the lines. After a few years you will have a lovely wall covered. I did this in my previous property to tactfully block the neighbour looking over and threw the fences - it was a south facing wall, and we used a jasmine. Three years later we had a two fence panel length of jasmine growth and height of 3metres. We trimmed and shaped it. The smell when it flowers is amazing.

Neighbour had put up composite fencing to replace the wooden ones copy what my hubby put up in our garden. Parking her shenanigans aside, to answer the OP question, the composite panels and posts are more expensive than the standard wooden ones as we looked into them and found the quality goes up the more you pay (obviously). The neighbour put down a cheaper variant because it 'looked pretty' but much to her dismay, and weeks of laughter for us, the recent UK winds and rain (including thunder) battered them and they split. Parts of the her fencing went over and into our garden, so we had an almighty operation clearing it all up (had to hire a vacuum) to make sure all the pieces were removed, as we have kittens running about the garden. A few of her panels and couple of posts looked like they needed replacement, rather an repair. Five months on, mainly because of COVID, she has not had it repaired. I suppose it would look nice but you have to weigh up cost/quality and the event of breakages. If you are environmentally friendly, then that would also play a part too in your selection. The final point, is the cost vs aesthetics. Hope this helps.