I'd advise going bug hunting on the island and just catch the larger stag beetles, you can make on a good run anywhere from 200,000 to 400,000 bells and it can take anywhere from 5 to 15 minutes per trip outside and back with a full bug load and depending on how picky you are with bugs out there. This means however removing the bushes and keep palm trees on the outer edge near the water and one normal tree in the grassy center for rainbow stags.
The Avatar was done by Chrissie.
"But perhaps victory is in the simpler things that you've long forgotten—things that require a smaller, more honest soul." Professor Ozpin, RWBY