I've got bees. It is DEFINITELY more than an hour a month I would say more like an hour a week, if you've got problems with your bees even more than that, plus more if you just want to sit there and watch them go in and out carrying their pollen.
I went on a Beekeeping Appreciation Day where they did a bit of theory and took you to some hives, and then the following year did the Practitioner's course which was an evening a week for 6 weeks and then about another evening a week for the next 6 weeks in the Branch apiary actually manipulating some bees.
Now had my own colony of bees for a year and I am now working towards what they call the Basic Assessment, which is kind of like a driving licence for beekeeping i.e. basic level of competence.
It can be extremely rewarding, hopefully you get some honey, and I love knowing that I'm doing my bit to help bees survive but I would strongly recommend getting yourself on a 'trial' day from your local BKA - as you might like the idea but when you've got 10,000 bees a few inches from your face you need to know if it's going to freak you out or not.
The other aspect is that your initial outlay can easily be a few hundred £ - a starter colony of bees can easily cost £150, plus there's your hive (£100 at least) and bee suit (£40-50 at least) and tools (£30-40), so you need to (a) be sure you want to do it and (b) commit to learning how to look after them as a swarm going AWOL can be a pain in the ass as well as an expensive mistake.
I could ramble on for ages but if there's anything you wanted to know please shout
YOu can also look at www.britishbee.org as they've got some advice for beginners.