I was in a similar position... I agree with Dori, he needs to see a periodontist. I went ahead with the implant process for one tooth, and I don't regret it at all.
Start with your general care dentist. He will actually do a good portion of the work, along with a periodontist. The dentist I had gave me the names of three perios to talk to and compare prices.
Depending on the location of the teeth to be removed, he may need what is called a "flipper" which is like a retainer with fake teeth on it. They run about $500 in addition to the regular implant process. My general care dentist took care of this, not the perio.
Also, when considering finanances, many of them will finance you. If your husband's job offers a flex spending account, you can use those funds to cover the costs as well. Ask for a quote and get it in writing!! (Even if you don't have implants covered on your insurance (very few companies do), ask for a predetermination of benefits anyway. Some of the procedures involved may be covered under a different code).
I know this isn't one of you questions, but I just wanted to prepare you- this is a long process. I wasn't really made aware of how much time it takes for the surgery, healing, more surgery, the crown, etc... It was a full year from start to finish for me, but I also had to have bone grafting done. Ugh.
Good luck, I hope this goes well for your husband. My tooth looks and feels real, I don't even notice that anything is different. If you have any other questions and want to ask someone who's been there, done that, please feel free to PM me!