Yes, good idea to give a little extra space.
We recently discovered some full size cante plants at our local rural nursery and I am considering putting two in the ground one day soon. Then I can collect seed for species and hybrids, if all goes well.
I suppose there are offsetting forms of any number of so-called solitary species, so maybe it's not a black and white distinction. A lot of solitary Echeverias will eventually offset if they live long enough.
In any case the parents of BB are also both solitary (in my experience, and as I understand things). So your best or easiest option for propagating that plant, without relying on decapitation, would be to snag the lowest bract(s) off the inflorescence (cutting just a bit into the flower stem around the base to ensure it arrives completely intact down there). With some practice this can be done in a nearly invisible way.
