Housing info and support needed

I have disabilities and in need of some help. I have to move from a interest only property, my ex had caused me bodily harm and been left toAy half the mortgage. We had some help from benefits, but now he's demanded to get it sold. I'm entitled to half equity. My problem is I'm moving back to Plymouth, to be near to family, my hometown. But I have my 12 cats and dog, my partner and 2 boys. I want to try get shared ownership, and put my equity down as deposit. But I cannot do this til house is sold and I got that deposit. I can't go homeless , how do I get around this situation. I'm under hospital for many health issues heart diabetes kidney liver probs, and in electric wheelchair. I'm close to a breakdown.