Tina I so understand

my tetraplegic husband thinks it’s a good time to be antagonistic and nasty now I’ve had blood results that are so frightening and can’t be cured.

i don’t have option to buy hi. Out as his disability means he needs our home for him and his carer

Hi tina,

A very warm welcome to our forum.

I am so sorry to hear of your distressing situation and wonder if you might qualify for some benefits now, because of your treatment? I know that this won't solve your housing situation, but it might help you with general expenses, when you are on your own. Macmillan are very helpful in telling you what you can or cannot claim. They often have a contact area in local hospitals, but if this is not so for you, you can contact them on line, or by phone and they will arrange to see you to help with this.

Macmillan are also good at helping with financial matters, so may be able to make some suggestions about your house. The other possibility would be to contact your local the Citizen's Advice Bureau.

I sincerely hope that you can come up with a solution soon, as this additional stress must be very wearing, alongside your treatment,

Please keep in touch and let us know how you get on. We are always here for you.

Kind regards,

Jolamine xx

Get some specialist legal advice! I’m no lawyer but it sounds like you have a strong case. 
Possession is nine tenth’s of the law and he is obliged to support his children until they are adults. 
Stay put and make it clear that you have no intention to move out and that he needs to support his kids.
Get your cancer sorted out before you even think about buying him out and don’t suggest any compromises until you’ve had that legal advice.

Gingerbread might be a good, free, place to start to understand your legal rights https://www.gingerbread.org.uk/wp-content/uploads/2017/08/Action-to-take-when-a-relationship-ends.pdf 

Good luck!
Dave