I've done just fine with tripods, even fairly cheap ones. The software seems to compensate really well for any potential drift - even if the tripod gets bumped, I often don't need to re-run the room setup to re-calibrate. The most difficult part of the cheaper tripods is that they're often fairly short, so if someone walks between them they lose optical sync. In a pinch I've set the tripods on top of tables and desks, and that's worked well enough.