It's a little crazy almost robotic but what I'm brainstorming about is imagine 4 accounts full of lvl 75s. Each char is setup:
1. alchemy, life to air daily profit 150g on my server
2. Tailoring, 5 dreamcloths per week, sell illusionary bags, all averaged out to a daily profit amount of also 150g (goblin brains required).

Total profit for 1 char is 300g per day.
1 char would be 9,000g per month.
4 chars would be 24,000 per month.
40 chars (10 teams of 4, basically all slots used) 240,000