As I understand some of the "core fleet" aircraft are NJ property and most of them have already been "paid", so no real capital cost.
For the newer ones used for the cardholders, i believe that NJ is just leasing them, with probably early terminations possible without any huge penalty. NJ being the biggest customer for many manufacturer they will do all their best to suit NJ.
Furthermore the one who as the strongest financial situation will survive, I believe that banks will support NJ more than Vistajet or any small outfit...
But in any case 2009 is going to be very interesting in BizAv.