Yes, I can, but first we need to know what do YOU mean by wall art? Do you mean paintings or do you mean actually painting art on the wall, if that; do you mean like a mural or just a design and for how much of the wall? If paintings do you favor a certain style? Artist? Or do you mean decorative things with no particular style/cost or message?
A piece of attractive fabric wrapped around a wooden frame. Decoupage using any paper or fabric or both using Mod Podge and framing it . Draw or doodle on to paper or sheet or directly on to wall and colour it in using chalk paint or emulsion paint or any paint you have...........Instant Art! Or call into to Thrift shops as they generally have stuff to hang on walls at a reasonable price. Best wishes.
Diane: I simply STENCILED my bathroom wall. (Then I added one of my own photographs.... that I had made with a 50% off coupon from:)
Here's a photo of the wall: