joe,
you'll end up with a favorite out of these three, be it size or ferreting ability, keep this one intact for your "breeding hob" get the other two castrated, these two can be kept together all year round, they can be left with jills all year round too, so no need for loads of cages,
sometimes a castrated male will still have the urge to mate, and this may take the jill out of season, but its not gurantee'd, but you'll still have one intact hob, he will need to be kept in a seperate cage over summer, as he will rag anything with a pulse, including a castrated male if you let him