Suggestions for affordable maternity clothes

As much as I wish that I could live in leggings and stretchy shorts right now, I am required to wear blue jeans at work. My regular pants are getting a bit too tight to tolerate now and I tend to go through pants pretty quickly (a monthish per pair) because I work in a place that is quite physically demanding. I generally end up with holes in the knees and/or crotch. Any suggestions?? I already hit up the local second hand stores because honestly, I just hate spending a fortune on pants that I know will be trash in 4-6 weeks. 🤷‍♀️ I also live in a VERY rural area, so shopping in store is not a very reliable option.