I have a single BA12-3 and use it with a Genx Benz Shuttle 9.0. I play in two guitar based indie bands, a moderate volume church band, and with a couple of singer songwriters. The two band drummers are not bashers. I've played a couple of small/medium clubs with no PA support and one worked very nicely for me. In larger clubs with PA support, it has been great on stage as well. The church band uses electronic drums so that is a different thing altogether. Part of my deal is that if that single cab isn't loud enough for on stage, then I don't want to be there and risk any more damage to my ears.
I do put the cab on a stand. when sitting on the floor, I find it too far away from my ears to hear it well.
I do GAS for an additional cab or a Magellan and 2 more

and sometimes think maybe add a BA210-3 to have an additional flavor... but don't really need any more than I have unless I wanted to have one cab to leave at church and a second for at home, etc.