If you live near a lowes/menards, or have access to some plywood or good barnwood, there’s actually some really nice tutorials for making backdrops on youtube. I usually search for stuff for food photography or flat lays, but you could just search ‘diy photo backdrop’ and get some ideas. Just depends on what kind of look you’re after. ^^
I currently only have one diy board atm (2’ x 2’ plywood), but it’s double sided; so one side has a white wash over the base wood color (I picked the best looking square that lowes had because of this), and the other has a spackle texture w/ white paint.
If you don’t want to go the diy route, they also make some nice vinyl ones that you can roll up and store when not in use. They can get a little expensive depending on where you look and the size you get, but they come in a lot of natural wood grains, stones, colors, etc. I got mine from amazon and etsy.
PS: Here’s some of the backdrops I’ve used in the past (old sweater, my 2’x2’ diy plywood board - spackle side-, cutting board that I got from Home Goods):