Education is the ONLY field I know where you go into debt for thousands of dollars just so you can work as a temp for years and years.
BTW, you can follow all of the rules and still be targeted by principals. You have no rights at all as a teacher.
In Oregon, subs are paid around 162 a day, but big whoop. Districts deliberately overhire for subs, so you may work one or two days a week if you sub for several districts. You still cannot support yourself on it.