For The gungas in terms of wealth/credits/whatever
you could have Booma Export's or something or maybe Plasma exports since in the star wars galaxy plasma is an expensive resource but is found naturally occuring in naboo and harvestable at a cheap cost maybe you could have a unit that flies up to space with a load of plasma and you get some credits/wealth/whatever and it would go underwater collect the plasma and go into space or outof the screen if your not having any space combat.
Just an Idea
I AM the prophet of the truth the protector of Star Wars Truism
Star Wars Truism by it's very nature is eternal and will outlive Star Wars Purism
Everything I say is a lie for the Truth is always greater than the words we use to describe it
Do you have any last words?