Starting new team

Hi all,
so I just started a new Horde team and I am now level 8 and coming to the crucial point of having to setup the trial accounts as permanent accounts. My only concern is that with what I am doing may not work when I hit 60. My plan is level two sets of 4 toons up to 60, then grant levels to a new toon which I will then move 3 toons in total back to my main accounts where I will finish leveling them to 80. So only using 2 new accounts linked to 2 old accounts. Anyone got insight into this or caveats to what I am doing?
My main idea for leveling a horde team is to see their quest lines but if I get tired of that OR want to level some additional sets of toons I may want to boost, if I move a tank over to this server, what would be the pitfalls of a temporary move? I have a druid or pally which I could move, anyone done a move for a month or two to boosts toons?
All insight welcome

No real pitfalls of moving a toon over, aside from the transfer cost (or double if you transfer back afterwards).
The cooldown to move them back is 3 days now, which isn't much really.