I'd say finish up with esthetician school and then consider going back to get a certificate in makeup application. I'm sure someone will disagree with me...but unless you are planning on having a background in special FX, movies, TV then there truly is no need to go to a makeup school.
If you are interested in doing these things I'd say check this board out for more info on MUA unions: http://www.modelmayhem.com/po.php?thread_id=333420.
If you are interested in doing weddings, editorials, runways, etc etc...then I'd say just take a few workshops to sharpen your skills. The fact that you will be an esthetician is often good enough for most people to feel comfortable with their faces.
I know a lot of MUAs who work in LA and make a full time living just doing freelance. I'm talking gigs like Nasty Gal, different modeling agencies, magazines, etc. She does a lot of more natural sort of billowy work too which really doesn't require a TON of MUA skill once you master it.
I'd say work on your port now. Get as much as you can covered: dramatics, avant garde, natural, bridal, etc etc. Network, network, network. If you can even try to see if you can get some gigs in LA and make a little trip out there! Get your foot in the door