My hubby (certainly not crunchy by any stretch) surprised me by being on board 100% for this homebirth. Well, he started out being on board for a BC birth, and then after much research and realizing that there wasn't much of a difference between HB and BC birth he came around quickly.
I would suggest talking to Tricare and asking for a list of CNM in the area who offer Homebirths. If there aren't any then I would approach Tricare about a refferal for an out-of network provider. In the hopes of having her covered 100% by Prime. (Wombat mentions this in the Tricare thread.) If all else fails get together information about switching to Standard and the costs involved there.
I don't know the HB laws in NC... so can't speak to that. However, the more prepared you are with the actual cost break down, the better your argument will be.
You may be surprised by how much Tricare will actually cover and how little the cost may be.
I'm thinking about buying an inflatable pool for 20 bucks for the water birth... and a couple of hoses. Although, one of the midwives whom I interviewed has birth tub rentals that she has suggested we try first billing Tricare for before we "invest" in an inflatable pool.
I am also going to buy a birthing kit. For about 35 bucks.
My big plan (still trying to get all my Tricare info in a row) is to have the MW covered 100% with insurance, and then I'll only have a few things to get in addition. (inflatable pool, birth kit, food...)
I think once you get the actual break down of cost, and have your HB safety argument lined up... THAT's when you should approach your husband about having a HB. That way you can offer a reasonable, afforadable, and comprehensive list of answers to your husbands questions. I can't imagine him having a foot to stand on after he hears how affordable it could be & how safe it is.

I did want to add that $$ is a big factor in our household too. We've got a little bit saved up... but I would find it hard to reconcile using specific savings on a birth, when the rest of us still have mouths that need fed and backs that need clothed. Not to mention a roof over our heads. lol. That's why I am pushing so hard to know as much about what Tricare covers. I may have to choose someone other than the CPM whom I

because right now it looks like Tricare will only cover CNMs.