Hi Rob,
I agree with everything you say here. The effort required to attempt to
make the SDR rigs accessible wouldn't be worthwhile because the number of
blind hams who would be in a position to buy one of them would be incredibly
small, as the cost of these rigs is prohibitive. I believe that the price
of the Flex 6700 is about $8,000, the same as the Kenwood TS990s.
Alan/KD7GC