I agree, it is a complete lifestyle. Once he signs up, he is committed to his contract. There is no 2 weeks notice or 30 day trial period. LOL The benefits are awesome, but you and you DH need to sit down and discuss the situation. My DH is the re-enlistment NCO for his unit and I asked him about your situation. He told me the best advise you can receive is talking to the recruiter. The recruiter will be able to go over ALL available options. And no one is exempt from deployment.
I must admit, it took me a little over a year to get adjusted to Army life. But then I realized, I am not alone. Everyone is in the same situation. DH has been in for 8 years, we have been married for 5 of them. I have moved 3 times since 2004. But, without the Army, I wouldn't have seen the places I've been. Right now we are stationed in beautiful Hawaii.
Tricare is great, as well as the use of the Commissary and PX.
I can't tell you much about how officers do things, but I can tell you what I know as an NCO's(non commissioned officer) wife. I echo my DH advice to talking to a recruiter as they would be able to fully answer his questions and let him know which MOS (Military Occupation Specialty) is open for him. If you have any concerns about Army Wife lifestyle, you can always buzz me, and I'd be happy to help in any way possible!!!!!
Good luck on your & DH's decision!