I know this isn't what you asked for.. Buh I don't know any. And this is how I get some extra bells.
1. Finders Keepers: Go to the gate with the 2 dogs. Go to Cooper, the dog on the left. Ask him to see the lost and found. Claim all items.. then sell them to Nook.
2. KICKASTONE: There are 6 stones in each town. 1 out of all of the stones if filled with bells. Go to each stone, and dig three holes behind it.. Then get the shovel and hit the stone with it. If sparks come out, your out of luck.. If a bug comes out, catch him with the net and sell him to Nook. If a coin comes out, keep hitting the stone without missing and wait till sparks finally comes out then get your coins, and add them to your wallet. **We dig 3 holes behind the stone so you won't bounce back and miss the stone.**
3. The 3 R'S: Go to town hall, and go to the reclyling bin. Put all the stuff in your pocket, and sell it to Tom Nook.
4. SHAKY SHAKY: Go to every tree in your town, and click A. Either a coin will fall, bags of coins, a bug, or a bee hive RUNNN!!
5. It's Mine: Don't donate the fossils you find to the museum, see them to Nook.
Not sure if I gave what you wanted, buh good luck.
♥ kaylaselina ♥