We have a DC7 (Disklavier) here, and it is also my personal piano - I keep it very well maintained. For clients, tunining and voicing of the piano before every session is not optional, even if it's one song. My piano tech costs $110, and is worth every penny. The reason it's not optional is simple - you cannot fix an audio recording of an out of tune piano, or even one note that doesn't sound quite right for whatever reason. Anyone who is not willing to pay to have the instrument in top form for their performance is not someone I want to record anyway, and I'm willing to escort their money and their attitude to the door. How's that for artistic snobbery?
Mediocrity be damned.
That said, the Damp-chaser system I installed last year...
http://www.dampp-chaser.com/
...is one of the best $500 investments I've ever made. It has already paid for itself in general maintainance and tuning in just a few months. In the winter especially, I've seen it go from 50% humidity to 20% in just a few minutes when the heaters come on. The piano would try to tear itself apart when this happens, but the Damp-chaser prevents it.