The
little time to learn.
Will probably still be a lot, lot shorter than the time you'll have to wait for a good artist to show up on your doorstep, just fyi.
If you really want such an artist you should expand/do promotion and get better known; at worst you get a few people interested in the mod, at best you get lots of interest and maybe even a new staff.
Posting pictures of your mod and maybe this request on other sites such as PPM and moddb will increase your chances or getting someone hired significantly (though community-wide its still low chance), at the very least you get more interest and maybe ideas or feedback.
Edited by MT, 08 June 2010 - 06:04 AM.