Having leveled two teams from 80th to 85th, along with Grizzly Hills dailies for a week or so on two teams at that level bracket (73-73), my guild has recently reached level 4.

I've contemplated inviting people to join it as a "leveling" guild.
Set guild repairs at something like 50g a day; so people can run higher instances and such.
With alchemy transmutes, I'm averaging 12k a day so should be able to cover repairs for a while.
Not sure if the lowest rank should be able to invite others; I suppose if bank/tab restrictions are in place, it wouldn't matter.