KloverKnoll and I use different methods and equipment. I use the Langstroth equipment and am a little more hands on than him, but less hands on than some others I know. I would say I average about an hour a week. More in the spring and almost none in the late fall and winter.
My suggestion would be 2 hives minimum. In the class I took the teacher sited right around 50% failure rate. Between my sister and I, that statistic has held true. But last year was my first year. I'm hoping, now that my colonies are established, the losses will be much less. The only 1 I lost last year I think I interfered with the colony's attempt to raise a new queen. By the time I figured it out, it was too late in the season to get them a new one. So I combined that hive with a stronger one.
If I'm remembering correctly I spent around $1,300 on 2 hives, 2 sets of gear, all the tools required, and 2 Nuc colonies. A good, strong, established colony can produce up to 100lbs of harvestable honey. Don't plan on any honey the first year.
It's a really fun hobby. But, I'm already tired of getting stung.