I have been teetering with this issue for weeks and decided to google it again. This thread was a lifesaver! I had searched the USPS website before for PO Boxes, but it didn't occur to me to scroll down and look for different prices.
I just found a box for $2 cheaper per month in a much nicer town (the next town over is 4 miles away and a "high rent district"). I also never considered having mail forwarded! I'm off to the PO now to get this finalized. Thank you!