How to make money without cheats, mods, or a job

I see that it's up to igazor to ask the Obvious Question once again. What do your sims need money for if they are trapped on a deserted island? >:)

I mean besides the property tax bills and the Repo sim, but I would probably cheat them the No Bills Ever LTR to stop those since they wouldn't make any sense in that context. I don't recall the Howells being any more successful on Gilligan's Island than the rest of the castaways, they only thought that their money was helping them. :p