Net takes 3.5 hours to make.
worms takes 1.2 hours.
you can catch 3 fish in 20 hours with net.
you can catch 3 fish in 9 hours with worms.
worms are made in a separate machine than nets, and do not impact ducks or lobsters.
So why would 1 net = 15 suns ? Me thinks 25-30 would be more proper.

I never use nets normally, as the are not economical. Dogdog