Hmm! That doesn't really make sense. If it's the money you want, you can spend a few evenings doing pirate massacre missions in a low RES, which is very similar to core mining in that you scan objects, then fire a weapon at a target and something goes boom, then cash in, except you get three times the money for it. Even if you don't enjoy it, you'll have several billion after a few sessions, then you can go back to your core mining and not worry about the earnings rate being less that laser mining.