I am a home educating parent who also works full-time. My back story is long and complicated but I gave up a well-paid job in management and became self-employed.
I have a DP - but he's not the bio father of the DC (twins). DP is off work sick and unable to help in any way - he's awaiting hospital treatment. The bio father has never seen them or contributed a penny - they're 13 yrs old. DS has very significant challenges - he still wears nappies and required special school. DD falls down the gap in the middle between special school and mainstream but managed to cope with support for a few years before it all went tits up.
Both DC are autistic with a range of other diagnoses thrown in to complicate matters, including PDA for DD, plus she's ADHD with a significant language processing disorder which is distinct and separate from autism. DS also has dyspraxia.
So. Two very different children. Very significant disabilities. Almost every home edder I know in my area has SEN children. The vast bulk of our home ed groups are SEN children.
Skimming your posts, you seem to have a very rigid view of what home ed should look like. Maybe because you're a reluctant home edder, you're being very dismissive of a huge group of diverse people, many of whom have walked EXACTLY the path you are on now.
I have only ever received an enormous amount of help and support from the home ed community. We get a huge amount of criticism from a significant chunk of other parents who don't quite understand what it's about, and judge. Honestly, yet more criticism coming from someone within the community is just frustrating.
You might have to change your job. It doesn't mean you can't work at all. No one said it was easy. It's hard. Fucking hard. If you can manage to set up self employment, that's the best solution as it means you can flex around your child's needs. But you don't need to be delivering education in a school-type setting, nor do you need to be enforcing school-type learning for six hours every day. There's a study somewhere which looked at the amount of time wasted in school and how much actual learning was done - I think it worked out on average something like an hour and a half every day! I'm not suggesting that you restrict your child's learning to 90 minutes a day but you really can loosen up a bit. Learning can take many forms, and with a PDA child that's even more important. Don't feel as if you have to be delivering an official education for hours and hours every day. Look for different learning opportunities. Once you get into the swing of things, it's fun. But it won't be if you go around sneering at the community who are trying to support you.