By the same reasoning that holds that the New Big East gets $4m a year for bball only while the AAC gets $2m for football and basketball (which is, few crud games, lots of teams drawing interest--apparently), a Big East that consisted solely of Syracuse, UConn, Pitt, Louisville, West Virginia, Cincinnati, Rutgers, USF & maybe a school like Memphis, would have jacked up the basketball side of the ledger considerably and increased that $13 million a year ESPN offer to $16 or $17m (and that's being conservative when you realize that the Catholics got a 100% increase when they left the BE for a new bball contract).
Is $17m a year enough?
It depends on what the other conferences are making.
Forget about the SEC & B1G because their numbers are way out there.
If the Big 12, PAC12 & ACC are all making right around the same or a little bit more (say $20MM which is where they are now) then yes, that is a great conference for keeping local rivalries alive and it provides enough revenue per school to keep everyone happy