The pros of guineas add up more then the cons.
Im raising them with to 2 pheasants, that is practically like the same thing. I would just have a large enough place to raise them I think it is 7 inches for each chick but I have heard of people raising them with littler space then that. How many...
They are adorable, and I would get more but they are expensive at my feed store. I would get some but fence the bees, it was a covered, fenced in area.
I don't think that they will terroize your chickens as long as they are little, but even then I've seen them get along.
I would get keets, but...