I have never really lacked gold once I started multiboxing.
the money just comes in 5x. I do mining, skining,herbs,enchanting and tailoring on all of my teams but I'm more of the casual miner/herbalist.
I have an alchemist, blacksmith, inscriptions, leatherworking on my main team only.
I make lots of bags and sell them but to be honest, they are at best 5% of the gold I make. I would say dailies used to be my best source of income followed by dungeons.
other than getting the 42Kg so I could get flyers+ epic flyers on 7 characters I don't actually spend that much on my characters. ( I guess I should add another 7kg to that for northend flying )
The alternate teams don't even have the epic flyers, at least not yet.
PRE-WOLK had pretty sad gear that could be made from professions except from the biggest of RAIDS. ( we have some really nice profession gear now )