The one big advantage to a tent over a wooden grow box is how easy and small they break down to. I mean, if you build a 4x4 box if won't even get through a door without being disassembled. What if the landlord wants to do an inspection "tomorrow". Good luck breaking your wooden grow box down in time. Grow tent can break down and shove under the bed in 10 minutes.
Regarding fan noise, the best bet is to get a fan larger than necessary, then also get a speed controller and slow the fan down. This will significantly reduce the fan noise while still pulling lots of air.