If your goal is to get 10 accounts at 80 and you are willing to spend a buck, then this might be an option:

- chain link ABCDE to 1 vet account.
- level ABCDE up as a team to 60 (team 1)
- make a new ABCDE team and level those up to 30 (team 2)
now
E from Team 1 can grant 30 levels to D from team 2
E from T2 can grant 15 levels to D from T3
your new situation
A: 1x 60 1x 30
B 1x 60 1x 30
C 1x 60 1x 30
D 2x 60 1x 15
E 1x 60 1x 30 (all granted levels used)
now to proceed:
D3 gives 7 levels to C3 (lvl 10 after doing the first 2 quests)
D2 gives 30 levels to C2 (lvl 60)
D1 gives 30 levels ti C3 (lvl 40 now)
new situation:
A: 1x 60 1x 30
B 1x 60 1x 30
C 2x 60 1x40
D 2x 60 1x 15 (all granted levels used)
E 1x 60 1x 30 (all granted levels used)
make new toon on B2, do a few quests to level 10 ( a matter of an hour?)
C3 grants 20 levels to B3 (B3 = lvl 30)
C1 grants 30 levels to B2
C2 grants 30 levels to B3
new situation
A: 1x 60 1x 30
B 3x 60 1x 30
C 2x 60 1x40 (all granted levels used)
D 2x 60 1x 15 (all granted levels used)
E 1x 60 1x 30 (all granted levels used)
B1 grants 30 levels to A2
B2 grants 30 levels to A3
B3 grants 30 levels to A3
A can get your vet account to 40 and grant a 2nd toon from 0 to 60 on your vet
your final situation:
Vet 1 1x 40
Vet 2 1x 40
Vet 3 1x 40
Vet 4 1x 40
Vet 5 2x 60
A; 3x 60
B: 3x 60
C: 2x 60 + 1x 40
D: 2x 69 + 1x 15
E: 1x 60 +1x 30
Now considering the total cost to setup 10 accounts with all upgrades, transfering 4 toons from your new accounts to the vet accounts might be worth the 80$. You will end up with 7 accounts with 1 level 60, and 3 accounts with 2x level 60. Considering specs and switching a dps for a tank for some encounters, that might come in handy.