Yeah.... there is that.
It's hard to remember to keep enough

on hand.
Have to save enough for the apple/cupcake/room decorations for each knuffel, and the cost of the knuffel itself, and then the ChipChip Fountain, Crystal ball, and Firefly Jar are pricey too.
So it's better if I can get a knuffel, level it up to 30, release it and buy it back, and *then* level it all the way up to 100 because that usually covers the costs.
And anything you find digging in Candy Island then becomes profit instead of "save me from debt as I go after the next knuffel"....