i had a root canal finished about 6 months ago. My dentist did it over 3 visits and over a year so I could pay as I went. All up I was out of pocket around $800. he was great and I had a 4 root, root canal if that makes sense. It isn't for the faint hearted so if he has issues with discomfort and needles, then he will need to work himself up.
HTH and tell your hubby good luck
BTW mine was a molar as well. and now my tooth is great!!!!