When I built our house, I had every intention of having a range in the basement which would allow for shots up to 25 yards. I kept one side completely unobstructed for this reason. In 10 years of living there, I've yet to take a shot down there and now have two rooms built on the side I intended to use. I can still use the other side, but I have all of the obstructions there -- furnace, circuit breaker panel, water heater, fuel tank, duct work, etc.

The multiple ranges I have set up outside work very well for me.