I agree... why do the hospital now? Show him the info you have, and explain to him that YOU want to do a homebirth. It's not too late to switch providers... not until the baby is out.

My DH is very skeptical of just about anything natural/alternative (but was all for bf'ing until the child self-weans

). When I first suggested the idea of an out-of-hospital birth, he said "Absolutely NOT". Wouldn't even discuss it!
I did my research online, found tons of links on homebirth safety, etc. (that's the main thing he was worried about - the thought of losing his wife and first child). There are plenty of studies showing that homebirth is SAFER than hospital birth, so start there. I also found links to pages that had alot of the common hospital practices (like episiotomies) and why you don't want them. I explained that I was not comfortable in a hospital just visiting someone else, let alone birthing in one! He read the info I sent, and finally agreed that homebirth was a safe option.
Next, I took him with me to interview the midwife. Choices are limited here, but thankfully we do have a good one available to us (we're in an illegal state, but I'm 15 minutes from the state line, and my midwife has a birth house there - really close to my house!). We met over lunch and DH was able to ask questions. She explained some of the emergency type things she's capable of handling and has handled in the past. She told stories of complications that had occurred and how she dealt with them, with mom and baby being perfectly fine. Some required hospital transport, but most did not. After meeting and talking with her, DH felt that she would indeed be capable of dealing with complications that could arise in childbirth, and he agreed to using her instead of going to the hospital.
I ended up birthing in a hospital anyway, since my baby decided to come at 29 weeks.

But with the education I'd given DH about natural childbirth and hospital interventions and such, DH was better able to support me in the hospital setting, including helping me avoid medication which he knew I wanted to do (even though he originally thought I wouldn't be able to handle the pain without drugs!). He was my rock in the hospital, and was on the phone with my midwife asking her questions and such. He was still skeptical of the midwife, but he was skeptical of the doctors/nurses too, and the midwife made more scientific sense! The nurses hated him because he was advocating for me and would NOT budge.

Needless to say, it was no question that we'd be planning an out-of-hospital birth with the midwife this second time as well. DH even saved the money from the first one (since I went early, I never had to pay for her to go on call), so we'd have it for this one.