I love playing as a tankadin. It's absolutely an amazing feeling being able to tank like 20 level 70 mobs simultaneously, solo. XD And having a tanked as a war and a druid, let me tell you, I'd never five man tank as anything other than a pally unless forced under pain of death.

That being said -- play for fun. That's why I have alts. Don't grind for gold for the sake of leveling something that potentially makes more gold. The farmers have you beat. If you really wanted to do it just for the gold, I'd say get a part time job and spend that money buying gold -- you'll get way more for your time invested.

Oh, and pretty much every tradeskill can make money except blacksmithing and engineering. Just say no.

Want fast, easy money? Just do the dailies. With 5 70's, you're talking about a new epic mount every few weeks.