I don't know why you would focus on putting costs in balance with RO wealth available to 1/3 of players. If you mean you want to focus on balancing costs for maximum possible wealth, okay (though focusing on average would make more sense to me), but you'd better fix the RO imbalance before increasing RO costs. An even bigger issue than the 27% vs 100% difference IMO is the 0% that non-traders start with, and the snail's pace at which it increases. Charging RO for cruisers will prevent non-traders from having access to any useful ships for quite a while from the start of the game, and I believe will prevent non-traders from being able to get a foothold in the universe at all.