i used an old dresser for the base of my cabinet and it was free!
i bet you could find something similar at a used furniture store,
but if you wanna keep something like that cabinet for stealth i think the only issue you'll have is with the height
36inches is prolly the outer dimension
after room for fans and your light your not gonna have much headroom for your dwc and a plant.
i was able to do it with 43inches but i used scrog and lst to keep the buds away from the light.
and you'll need a good fan for exhaust!!!!