Dollar general is a great place to look for cheap DP bait. (Cat food, molasses, sardines, jello). Save old containers to mix and store your bait. I make all my own DP bait and don’t have more than $10 in to make about 2 gallons,
I buy a roll of waxed paper there also, cut it into seactions appropriate size for trap covers. Put a bunch of precut sections into a single ziplock bag.
Get other fur stuff there too like cheap dish soap for washing coyotes, back in laundry section they have cheap wooden clothes pins. I use those a lot on my wire stretchers to keep the edges and ends nest and tidy while drying.
Grab a box of twenty mule team borax while you are there too. Keep coyote and cat bellies nice and white.
I save and rinse out all of my empty plastic milk jugs. Store a gallon of sifted waxed dirt in each and east to carry.
Save bacon grease. Boco mentioned saving sardine oil. Save tuna oil too.
Garage sales are good places to find old carbon steel knives. Much easier to sharpen for skinning than stainless knives. Look for sharpeners and eve meat grinders too. Don’t forget hair combs that can work as fur combs to get burrs out. Get em for a bargain.
Pick up every free washer I find on road. Lots of those turned into beaver snare locks over the years for my line.
Jim