I'm sure there is an interest in hand drawn images. I, for one, would be interested in hand drawn compass roses. Mine are rubbish!

As for money - I've ended up picking up a few commissions on the side from this site and others. RPG.net and The Forge (http://www.indie-rpgs.com/forum/index.php?board=29.0) are good places to stick a post with maps in it (though read the info for the Forge boards before posting). I don't make anything significant from it, but the commissions are good ways of building up a portfolio of different stuff.

Equally - have a look through the members list for those people with Industry Professional under their name. They do make their living (or at least some of it) from mapmaking or associated arts. They are the people you need to direct further questions to.