Hi there, and I'm so sorry for what you and your family are going through.
There are a lot of amazing organizations set up to help ALS patients and their families. Patty mentioned the ALS Association - there are local chapters everywhere and if you do a google search for your area you're guaranteed to find yours.
Also, the Muscular Dystrophy Association is very helpful. They extend aid to ALS patients because of the similarity of the disease.
If your husband was in the military, the VA may be able to help. They have case workers who are incredibly good at connecting you to resources.
Also, talk to your neurologist. They can connect you with a social worker, and the social worker can connect you with some amazing resources. Social workers can be fantastic allies - they know everyone and they're not afraid to be pushy and make things happen for you!
ALS is a hard illness, and what you're doing is not easy. But what you are doing is also wonderful and compassionate, and you will never regret it.
I wish you the best and hope that these resources help you!