This video shows just how fast you can work in ZBrush using Genie Voice Command for ZBrush.
I haven't decided on a price yet so after watching the video or downloading the trial version and trying it out for yourself please leave a comment with what price you think would be fair.
Genie Voice Command (GVC) for ZBrush is only available for PC right now. (NOTE: I have changed the name and moved my website. It is now HMC Voice Command.
https://hmccabe.com/