The Cybermage invents various devices and sells them to professional stage magicians. He also does consulting work for several corporate security firms. He would be quite well off if he didn't spend so much money and time on his private scientific experiments.
Mr Gone is a living dream. He doesn't eat or sleep, and his clothing regenerates as fast as the rest of him. His 'profession' is spirit of vengeance. If he happens to stumble across some cash, he gives it anonymously to one of the local orphanages.
Mr Grey lives off his military pension in a crappy little apartment in King's Row. Since his wife and children died, he hasn't had a lot of expenses. He treats heroing as a full time job.
Cheap Jack is a professional bounty hunter. The hero license is just a way to expand his business. He also charges the city for his expenses, counting the cost of every bullet and explosive device.
Atman Ra inherited great wealth. He has no job, though he does take his responsibility to protect the innocent very seriously.
Viktor Radkowicz (Doc Rads) used to be quite well off, but the legal expenses stemming from his campaign on behalf of the "healing power of radiation" have left him nearly destitute. He is barred from practicing medicine in the US, so he spends most of his time working with other heroes in the field, where he is allowed to practice his odd theories. Occasional donations from people he has saved are his only source of income.