Cats do not stink. Dirty cat litter stinks. If you keep the box clean, you will have no problem. My friend has five cats, PLUS she fosters cats that the shelter has no room for. Very seldom does it ever smell like cat in her house....usually if it does, it's 95 degrees and humid out. 99% of the time, you would not know she has cats.
Cat experts...one cat or two? - Page 2
I'm really just going to end up echoing other PP's.
One cat is likely to be fine by itself, especially if other people are home to interact with. If that isn't the case most of the time it might be a good idea to get 2 (you can always get one and see how they do by themselves - we didn't get our second cat until 6 months after our first, I started working full-time in that period and we could tell our cat was lonely and thought he'd appreciate a companion. He ended up getting somewhat more aggressive with me like he was trying to cat-play and would do stuff like try to crawl up on my shoulder when I got home needing attention badly).
Only 2 cats and people who change and clean the litter box will not mean your house smells like cat pee. There are great litters and boxes that reduce the smell.
(Maybe let your dh choose one of the cats, or find one that's attached to him, that helped the whole getting/having cat thing for us - one of ours is very dh's cat ).