Think about how much supply you need. Find out what your intake is and figure out what that translates to in minimum production needed.

Also, if you make it big/wide enough, it can be your flower AND veg station with a partition in the middle.

One more thing, this is just me, old furniture works great because it already looks like something else. I deconstructed a dresser, but I bet an armoire or something big and useless that nobody wants would work perfectly.

Cheers!