someone said there was no hard cap to Cr per mineral output? actually there kinda is, it seems that no matter what rank you are, after a certain point (rank 500 I think) you won't get more than around 48K Cr per 1 mineral from a NORMAL mineral pull(the pull has to be a reasonable size, at least 10-20K MP and you can't have 50K Ku already when you make a mineral pull)
this means at 20K MP/hr at rank 500+ you're almost guaranteed 23B Cr/day from minerals, give or take a billion(but 48K seems to be pretty reliable)
my reference:
viewtopic.php?f=4&t=21475this means that with any ridiculous upkeep you can calculated how much MP/hr you will need (because you're upkeep won't be TRULY ridiculous until you're a bit higher ranked anyways