Yeah, good teachers are hard to find, especially if you don't live in a populated area. Like Az said you want to find someone who see's you as an individual student. When I used to teach and I had someone who has been playing for awhile, I always had them play first to see their weaknesses and strenghts. You'll know if you got a good teacher if he/she takes note of this, and they should talk to you about it. Then guild you on a plan to make you better all around, remedying your weaknesses while stabalizing your strenghts. The rule "a chain is only as strong as it's weakest link" also applies to guitar. Since a song will probably use numerous techniques you can only play it as good as your weakest technique.