Unsure of how to proceed

Maybe try use wooden posts and panels, you might be able to find them on sale or reduced.

Always people selling used decking boards or feather edge on Facebook or gumtree.

Good afternoon As the other person said to keep your budget down the only way really would be yo use 6x6 panel fence along with wood post concreted in. To gain your extra height you could run trellises on the top this also gives it a decorative look. Hope this helps.

You need to be using concrete posts and concrete gravel boards if not you’ll be changing them in 10 years down the line. Spend a little more the fence will last longer

Use wooden post and panels. Sometimes you can fetch some cheaper panels from fencing retails supplies, (ie) warped or damaged panels that with a lick of paint can look good as new. Look around on social media and selling sites (ie) Ebay, Gumtree and facebook market. Better off spending your money on a professional fencer that installs them properly so that they last longer.

Try looking online or selling pages on Facebook for materials to keep costs down.