Okay. Here goes.
I'm 54 recently discovered I'm on the spectrum myself and I've been married for 26 years with a son who has ADD and is Aspie and now a young adult my husband is also Aspie and ADD.
We've been well off for a time but life happens and austerity hit us hard and so we no longer live in a big house with a big mortgage we now live in a private rented house and have next to nothing.
I am emotionally and physically drained and have next to no self-esteem. You and I have stuff in common but certainly not exactly the same.
I do know what it is like to find myself without a steady income and with a nervous anxious child and at one point we were homeless and living with a relative after a fire destroyed our previous long term home.
The one thing I know is that as long as you have a roof over your head and food on the table stuff isn't so awful as long as you live in a way where you are not feeling unwelcome and unwanted in your own home.
I think you should get advice from a solicitor/women's rights organisation/here about the legal position you are in.
Whether your husband likes it or not he has married you when you had a full time job and an independent lifestyle and during the marriage you became a fulltime housewife and lost your independence and self confidence.
When I got divorced many moons ago as a youngster I was told by my solicitor that the law looks into what has happened to you during the marriage and if during that time your husband has assumed the role of breadwinner and basically you've become a person who has lost their skills at supporting themselves then the law sees that as him now having financial responsibility for you.
I don't think it matters how long you've been married - I'd only been married a couple of years and my solicitor said I had the right to take him for half of everything back then.
As it was I didn't bother as I had no responsibilities and I just went to college and started again as I was young - but your circumstances are different - you've been married for a substantial time and you have a dependent child that your husband assumed responsibility for as well.
I think you need to get proper legal advice from someone who knows what the situation is now. I suspect you will find you are in a much stronger position than you realise.
I also know that if you find yourself living in a rented place without much money but (fingers crossed) it is a housing association type place and you get a calm tranquil atmosphere then you will find things are nicer than you feared.
It will be better for you and your son.
Please don't take your husband's valuation of the situation as accurate. I also think that he may have been emotionally abusing you subtly - it happens incrementally and you might not even realise it is happening. But there seems to be real grounds for a divorce on your part and as I said it is likely you are not trapped as badly as you feel you are. Good luck.