Well being that I am old :) Money for me didn't start to come in till I
was in the mid 20s. When I say money I mean having enough to have all your
spells in your book with change left over. :) Now a days to get loads of
cash (10k+) you either need to sell items for cash or farm mobs for it.
Undeniably one of the best ways is to be a pet caster at 49+ and hit the
hill giants. A friend of mine made over 20k+ in one week between her and
her partner doing just that.
As for levels one of the places you can try would be sol A. The items from
there don't trade that great but you get lots of FineSteel drops with a
vendor in the zone. Enchanter pets aren't quite as good at the job as are
Mage and Necro pets but at your level, and more than likely even better at
44+ you should do ok in Sol A.
Hill Giants are generally though of as better, but at your level you should
probably enlist the help of a partner or two.