Ok guys, thnx for your replies

Just researched Helping Hands, and with this I can get a good amount of marble and crystal. It should be enough for the upkeep of 4 colony's I guess. ( with the long building upgrade times at high lvl, and the fact that you can only upgrade 1 building at a time)
So I made a sulfur colony :p.
Now I can start making my navy a bit bigger ( dont have many boats :/)
But thnx again for your help
