As a teacher, if presented with this topic 3 years ago I would have been about 3 weeks behind where you seem to be. I changed from teaching in a mainstream school to teaching in a PRU and am currently on my third academic year. My wife has said on many occasions when asked that I am like a new man/ Dad/ Husband etc. The job is fantastic, I sincerely love most days at work and enjoy planning for it. Marking takes me about an hour per week, max. I work from 7 – 3pm Mon-Fri and spend around 2 hours per week during my evenings and weekends planning.
I’d advise you to at least look at other options within teaching as there are plentiful, there’s a massive shortage of English teachers in all classrooms so u’d be hot property too. The Special Needs field is huge, go and investigate what may work for you as it doesn’t appear that mainstream does.
Should you be in the West Yorkshire area I may be able to support, if so let me know.
Good Luck!