I've made a few from expired beverage coolers. Stainless with shelves alreadyin a glass door to keep an eye on things.
they usually have the compressor on top. remove it and but a vent grid on to control air flow. Add a heat source [hot plate] and add a pan of chips. a through the wall thermometer and load her up.
Box is insulated and sealed
Takes less than two hours from start to smoke.
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