I'm sorry but an activity that apparently is a full time sink, why would you want to do it on alts as well? Like, I'm sure that if you get at it you can spend 24/7 on it on a single character.
Also 2 dozen alts and all around level 50?? Why not, you know, focus on one or a few and take them to endgame, instead of having 24 alts at lvl 50?