Another "what will it cost" thread? I'll repost the suggestion I made on the last one: 3-4 billion for the Carrier, plus another 1-2 billion for each support ship (and the ability to buy one of each type of support ship). Maintenance cost should be a percentage of earnings (as with SLF copilot salaries), 40% of income for the Carrier plus 10% per support ship. If you have SLF copilots too, their salaries are a percentage of whatever income you have left after Carrier expenses (otherwise you might go beyond 100% of income).
I can see the argument that they should be more expensive, these are enormous indestructible superships with a 500ly jumprange. But they also have to be affordable for individual players.
There are a number of ways of earning in the vicinity of 100m per hour. At that rate, 3bn is 30 hours, which is ten 3-hour gaming sessions: this is achievable. But several times this would be excessive. The most I've ever earned in a single transaction was 2.3 billion (but that "single transaction" was handing in several months of explo data after ranking up to level 5 with Li-Yong Rui), I haven't actually mined any void opals yet.
I'm also assuming that the Carrier will have just enough space for the listed 16 ships, rather than infinite storage under each pad. I fear that giving Carriers infinite storage would make them unaffordable, I think it's unreasonable to expect infinite station-style storage for a few billion. Though one possible expansion would be the ability to carry many (possibly infinite) small ships only: that would give a purpose to small-pad ships.