I've got tons of stuff lying around, so I decided to build a clonebox.
Equipment:
Hot Glue Gun
50w LED panel
(2) 80mm fans, 12V .15A each
12V 500mA AC-DC adapter
Cardboard
I used the totally useless-to-me UPS Express tubes I had spare. I used four of them, three to make the triangular box (The self-sealing helped with rapid construction,) and one to cut out and make the top of the box, which was hot-glued in place.
I cut out two 65x65mm ports, one about eight inches from the bottom and another on the same side about 15 inches from the top. One pulls in, one blows out.
I fixed the LED panel to the top of the box by knocking out three holes for the mounting bases to slip through, then used simple cuttings from a straightened wire coat hangar to keep it in place.
Plenty of room for about 18 or so large clones, temps stay steady at about 76-78 degrees, depending upon room temp in my office.
Took about 10 minutes to build, tops. Good to go for many years, now! I'll eventually reinforce the vertexes with a plastic skeleton, but for now, it's solid and doing the job!