Yep, agreed, but as I said earlier, there is a world of difference between acoustic and electric instruments, and ‘get away with’ is to my mind more about a cheap and feedback resistant DB actually being a better pro choice for the bluegrass job than one that, for jazz or orchestral is more resonant, sustains for longer but on both bases feeds back more.
£15k is bottom end for orchestral, at least once you factor a bow in as well