I think you are worrying a bit too much. Especially as a warlock you don’t need cash. Lock was my first classic char and I spent 0 attention to gaining cash. At 40 you go to your trainer and get your free mount, and at 60 you will have the 300 or so gold required for getting the epic mount (with another lock already having the mats helping you) right away.
Thats the thing. For any other class, maybe worry. But for warlock, just no.