The snakes are easy. As far as daily maintenance it's less than 15 minutes. Feeding days a little longer. Full enclosure cleaning day is about 3 hours, but I dilly dally and lolly gag and take my time.
Fish are easy on the daily too. The tanks both get cleaned every other week and I do both the same day, about 2 1/2 - 3 hours usually.
Ferrets, on the other hand...are a pain in the butt!!! I love them to pieces, but their daily cleanup entails me climbing into their enclosure (I turned a 4'x6'x6' closet into an enclosure with ramps, levels, tunnels, etc...) for about 10-15 minutes twice daily. As well as washing their blankets weekly.