If you own your house outright then that’s a massive advantage, and selling up would be the last thing I’d do. Housing security puts you in a better position than most.
If your husband’s business does not cover its expenses then it isn’t a viable business. He needs to speak with an account about insolvency, and how debts/ committed outgoings can be managed depending on the type of business. Is there a business loan secured against the house?
Either you or your husband needs to get a full time job. He doesn’t have the option to be too proud to work for someone else. Depending on what he does, there may be scope for you to work weekends/ evenings around his working hours ( or vice versa, if you get a job and he does daytime childcare).
I get not seeing the point of working when childcare costs would use up all your earnings ( I’ve been in the same boat), but you need to look longer term as well. The children won’t be little forever, and it’s easier to pick up a career later on if you’ve kept it going, even a day a week.
Are you in the UK? What makes you think you are not entitled to any benefits?
I get that it’s hard, and people seem blunt. There isn’t a magic wand anyone can wave, and it’s hard to give specific advice when your details are vague. Only you and your husband can make decisions.