Winning cures everything - I can see all 3 taking less if need be to help the team and stay together. All 3 will make a lot more in endorsements if they stay together anyways and keep winning - especially in China where LBJ is hitting them hard with marketing. If they value winning AND money, imo it's more advantageous to stay put.
In reality, Arison has already stated awhile ago that money and the repeater tax will not be a hindrance to resigning all 3. Something to keep in mind, Arison, the stadium, the franchise itself does not have to pay any state taxes plus the TV money they have coming in may not be on the Lakers level but it's pretty damn good- (and this year everyone is going to be watching to see if the Heat will 3peat, rooting for them to get knocked out I'm sure).
IMO Wade will retire a Heat, Arison would be hung if he traded LBJ and Bosh
is clutch and spreads the floor for the other 2. They're all dependant on each other.