luthiery school won't give you any more credibility than the builds you're already doing. in my opinion, keep doing what you're doing, you're going to get to school and find you aren't learning anything. my certificate from roberto-venn means nothing to most people, and if it does mean anything to anyone, its that they think that i think i'm a master luthier because i went to roberto-venn, and a lot people who come out of there tend to have that attitude. i'd really think it over, cause its really not worth all that money if you already have the skills. nothing gives you more credibility than the guitars you're already building. and i gotta say man, i've trucked my guitars to all the shops around here, trying to get in as a tech, and none of them are interested, the only way i've gotten to make money off what i do is going solo, and i'm glad i did. going to roberto-venn helped me a bit, because i didn't know anything about fret work, or much about the actual construction of a guitar, hell i even got more guitars built than anyone in my class, but if i were where you are right now, i'd have never gone, it wouldn't even be a thought in my mind. hell ask mike sherman what he thinks of roberto-venn... its part of the reason there are too many luthiers out there, and its hard to find a job.
also, once you graduate, it doesn't matter if your top of the class, you don't get anything special out of that, and no one cares in the outside world what you graduated at. there were some guys who didn't even complete the basic course requirements at roberto-venn and still graduated. i'm not sure where you're planning on going, but if its RV, i'd consider somewhere else, that school is a bit of a joke overall...