They separate between regular instructor pay which is hourly, and the salaried instructors who commit to staying for a year.
Don't budget around completing the pro course in six months. The average is 9-12 for committed students, and remember the listed price is meaningless.
Before you commit to giving up your job, take Daveys advice and go to visit some schools, and preferably take someone with you who can help you look for the right things. I wish I had!