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That's basically what I do, but I capture a new calibration video at the beginning of each 'day' of shooting just in case the cameras got bumped or moved. Shooting a calibration video only takes about two minutes, which is well worth the time. It's a horrible feeling when you spend hours on a shoot only to learn that your old calbration file is no longer valid and you don't have a new calibration video to track.
If you mod the cameras the way I did (Helicoil kit,) you can mount them onto tripods, low cost light-stands, security camera mounts, or anything with a compatible quarter inch thread.
A while back I made ceiling and wall mounts using parts from the local hardware store and some knuckles (gimbal joints) I bought from eBay. (These knuckles are identical to the ones that come with a Stickypod camera mount for cars, but cost about a third of the price.) If you suspend your cameas from the ceiling, you can hang pvc pipes from the rafters, but you will need to add a C bracket on the end to flip the camera orientation.
FYI, while I have all the parts assembled for this, I haven't actually mounted the cameras permanently yet. I would recommend using moveable stands until you are certain where you want to permanently fix your camera. (I'm still deciding if I really want to permanently fix mine.)
G.
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