Or if you need known-new boards, especially in quantity, though RPi has its own availability limitations for commercial use IIRC. Power and Size restriction ca

Or if you need known-new boards, especially in quantity, though RPi has its own availability limitations for commercial use IIRC. Power and Size restriction can be a bigger deal than you've made it sound, though. I can fit ten Pis in a carry-on without concern if needed, and I have needed to do so in the past. For noise reduction, fanless is better than muffling a fan, though one does need to make sure the heat sink is big enough.