Always consult legal advice in your own area but going from the info you have there, if it was in PA, you could just buy the home without your husband. Now you would need to qualify on the loan yourself which means your income alone since he does not want cosign (even if he were to get a job).
Also if it is your parents home, who owns it now? Do you have other brothers/sisters you would be buying it from? Is it owned free and clear? The easier thing to do might be have your brothers/sisters draft up a seller financed deal where you pay the mortgage to them. Now this involves family and if you were to default, I wouldnt want that to ruin a family but this is another option until he gets a job.
Reach out to a local IA realtor or attorney.