Just another quick suggestion.... unless you make it big in a major label band, or become a very popular session player, it's doubtful you'll be able to make a living from playing guitar. About the only other way to make money is by writing songs and either selling them to well known acts or licensing them for commercial use. I guess what I'm getting at is, besides guitar, you should be learning everything you can about the music business. How record labels work, what session players need in the way of experience and equipment... know how to do multitrack recording so you understand how it works in the studio, buy or borrow as many books as you can on everything from theory to room acoustics.
For instance just as one example, right now, could you lay down a demo recording in less than an hour showing off your skills with all the backup instruments, plus vocals, completely mixed and mastered. Then put together a decent looking web page with a link to your song in MP3 streaming format? Then make .aiff or .wav files available with several different including instrumentals so that they can be downloaded from an FTP site?
Cause stuff like that happens all the time... you'll get an email message asking for a rock tune in a style similar to U2 or whatever, with a classical guitar lead line and a few lyrics and vocals about finding a lost love or whatever. You've got one hour to get it written and recorded or you'll lose out on ten grand.
You've gotta have Cubase or ProTools, a classical guitar, a decent mic, tons of loops and plug-in software, mastering software, conversion software...etc..
plus know how to use it all as well as knowing how to put together a web page and have your own FTP space ready to go.
If all you know is guitar, you're screwed. You have to book studio time and musicians and pay for it out of your own pocket and probably take more than a week to get it done.
Meantime somebody else has already gotten the job... plus impressed the music supervisor enough that he calls the other guy next time he needs something really quickly. You on the other hand, won't get called again because you only have one chance to make a first impression.