Nowt wrong with condenser dryers, despite an earlier comment. You get much fluffier towels from them than vented dryers.
Bolt-down commercials are not a good idea - crude and slow-spinning, plus you get tons of vibration. Commercial machines now are increasingly soft-mount.
There are commercial-grade domestic-size soft-mount machines around in the US, including Girbau/Continental, Electrolux/Crossover, Maytag/Whirlpool and LG. Otherwise I'd go Miele Octoplus if you can - the dryer is vented, but hey ho.