I love this idea, but what about keeping it ultra simple, if you essay a plot that you don't own, regardless of quality of land, you yield 10% income from sale of all units that plot produces of crystite till the end of the game. If you own it then you don't get it, and if the plot produces anything else other than crystite you dont get it..

I know it's mentioned elsewhere but I would say expand the audience and release on iPad... It would be amazing, and I am sure priced correctly, you could recompense quite handsomely... I'd pay 5 pounds for it easily !!!!