This is all very helpful, 6 tickets would be great, I was able to get rid of my 80k delta miles by giving to a friend who was able to find a ticket in the low season and they reimbursed me for the $1,000 it would have cost, so I have that $ also.
How can I coordinate it all? meaning if I book a ticket with CO and then go to United(I have to call them, i guess?) how can I be sure that the flights would still be available? Or on ANA? Do any of these airlines allow a hold or 24 change?