At 61 I had 0 gold on all 5 of my toons - buying the first round of epic mounts drained me dry. I am now 66 and they all have 400+ and I haven't been trying to save money. That also doesn't count the money (about 1k) on my auction alt from the greens that I AH - and I only AH the greens with good attributes (of Spirit plate, for example, gets DE'd). I don't think money is much of an issue for boxers because we have nearly 0 downtime. Often I'll find, 2 hours into play, that I never did conjure water for my guys... I simply never needed to drink - and that's even with AoE grinding etc.

My biggest issue has always been finding mobs to kill... not killing them