Auto grow= No tent no problem or trubs galore?

Currently running a SF 2000 in my 2x4x6 tent. I’d like to reserve that for photos but I also have another light (sf 2000 knock-off equivalent) and a bunch of great auto seeds but not the space for another tent.

What troubles might I have if I grew the autos under the light in a well ventilated closet with moderate environmental controls?… Worth the risk or a bad idea? Thanks for any advice!!