Well done sounds full on...Teaching is nearly a 60hr week in term time as a new teacher...i found it took away from helping my own family and although i worked in industry long hrs before my degree ..the post grad year was really time consuming it may be different now as that was in 2000 but planning interesting entertaining lessons, being observed, writing reflections on ea lesson and feedback for years 7 through to 13 was the busiest work focused year ever...i'd probably think the youngest may need to be in school to be able to focus on teaching...but you could sign up to tutor agencies and maybe tutor online on skype a few evenings if you have anyone to look after your kids for couple evening hours a few days a week...as well as look for daytime work.
I make my own web-blogs to use for tutoring...u need to know the specification but can just follow the exam board recc student books for Eng Lang and study books for Eng Lit