I used to grow tropical Nepenthes in a grow tent in an unheated basement with a 250W halide lights, misters and humidifying unit. I could keep conditions very very stable. I never had to heat it as I cycled the light output thru the built in vents to keep it hot during the day, then at night would gradually cool off. I used an ultrasonic mister (used for fountains), and a water resistant fan to keep the humidity stable. Worked very very well until I moved, and they died from the shock
Anyways... It's an interesting idea as very dark *when closed*, and if you had a heater with a thermostat, I bet the humidity and temps would be pretty stable. The vents would allow you to pass tubing for outworlds external to it as well. For minuses, it's probably going to be a bit flimsy, and every time you open/close the zippered flap, it's going to annoy the ants from the movement from all the shaking. If you have any little kids or pets, especially a dog, it will get banged around... Also insides are super reflective, so opening it up, and light that strays in will be reflected a lot.
For the price it couldn't hurt for an experiment, but I'm personally going the sturdy cabinet route this summer.
Edited by noebl1, March 17 2017 - 6:26 PM.