My DP wasn't convinced, so I sat him down and showed him just how much we were going to spend on disposables a year (rough estimates) then showed him how much re-usables were going to be (I brought all mine second hand, I also benefited from Freecycle and car boots!). Suffice to say he was surprised and pleased! I also mentioned that once we have them we won't need more ... so if we have another baby!!
As for the smell, HA. I tell you what DOES stink, a pile of disposables in a bin on a hot summers day! Get a good nappy bin (air tight lid) and you're sorted!
My DP takes responsibility for the night time change, he can now change our DD (12 weeks) into a reusable at 2 in the morning when he's half asleep in the dark! You can always put the nappies together so all he has to do is put them on, no harder than a disposable and if you get it slightly wrong you don't have to start over with a brand new nappy!