See a solicitor. If you can't afford to buy him out, and he won't buy your share of the house you will have to sell and divide the proceeds. If he refuses to you can apply to the court for an order of sale and division.
Is there any reason you can't work full time? As there are no young children it will be far better for you to support yourself and not rely on your husband.
You can apply to the court for a financial order if you and your husband can't come to an agreement.
As I said at the start, see a solicitor