Hi @johk88, gosh you’ve had so much to deal with 
I read the bit about one day you want to leave and the next you don’t know why you were thinking it and I think for me that is what drove me to depression/MH issues. I’ve read about it since and understand it for what it was/is. In terms of the grass isn’t always greener, I think it depends what you want? For me, living alone with my DC means the grass is greener for me.
That’s not to say it isn’t hard. My H has gone full circle so on top of his usual great attributes (loyalty, honesty, hard working, practical etc) he has ramped up the loving & emotive side and is now devoting Sunday to family time/time with kids. I just don’t think he can change. Currently going through the process of getting a diagnosis.
Anyway, my hat goes off to you for getting through 30 years, especially with the additional difficulties of children with ASD too. You must be a totally incredible woman so give yourself huge credit and make sure you look after yourself as well as everyone else in your family.
I think you should write the book! The only book around about a personal experience is ‘Broken’ and while I could totally identify with lots of it, it is poorly written (no grammatical structure etc) and does not offer a balanced perspective or any of the positive traits of ASD. My H asked to read it and I told him not to as I don’t think it would be helpful (I did refer him to the Karin Friedman article, the Different Together website and the Neurotypical website so he could try and see how I felt.)
Hope everyone had a good weekend xx