Free: Contests & Raffles.
Besides the bystander danger of the 10MM, I would be concerned that letting off a full-house round indoors would be blinding and deafening. Truthfully, I'm considering getting one of those keltec jobs that holds 30 rounds of .22mag, for my bedside pistol instead of the 9mm I have now.
I wouldn't want to start shooting a 10mm hot load through the house walls. Yes Yes I know you're the best shot that ever lived (aren't we all?) but even the best shot that ever lived is probably going to miss the bad guy with a few rounds when lead starts flying, a hot 10mm will go through a lot of interior walls of a house and even exterior walls and into the neighbors house across the street.