I think that, with the right approach, some money can be made on a small herd of cattle. I usually run about 20-25 cows on my place and make a few dollars about every other year, but I'll never get rich doing it. I don't even do any kind of selling/butchering anything like that - usually just sell at the local livestock market.
Most of my cows are angus-based mutts and I use a Brangus bull. Typically, aside from the normal winter feeding, I don't have to do a lot with cows, but I might have to pull one or two calves per year and I might end up with a bottle baby on occasion. Most of this is because I am a sentimental farmer and I don't cull my herd like I should - I keep most of the cows until they die of old age, and they may be barren the last year or two of their lives. Most of my cows are named and are friendly to people (i.e. you can approach them and pet them) so I figure that if they've pushed out 10 or 15 calves in their lifetime, they can live out the last couple of years free of charge.
Most of the time, I find having cattle to be a relatively low-stress sideline, and I do enjoy just walking among them and talking to them (so far, they haven't talked back - I may get out of the business if they do). Of course, last year on Christmas morning I had to help pull a calf from a good cow that had gotten herself in a bad position (feet uphill, back against a tree - stupid cow), so timing is everything. But it does make me feel good when everything comes out okay (pun intended).
Whatever you choose, good luck and take care.