We ran one of these (
not exactly same ) in our house addition for like 20 years on mostly pallet scraps. It heats very well and is fairly small for a wood stove. It would cook that room even dampened down.
Up to 900 sq ftUp to 54,000 BTUs1.2 cubic feet fireboxNon-Catalytic Secondary BurnEPA ApprovedAir Washed GlassNo Electricity Required
www.usstove.com
If you need smaller than that look for a "guide stove" It the kind that goes inside a large 8-15 man tent. They are really small like the size of 2-3 boxes of boots. Here in PA there is a plethora of great used wood stoves on FB for under $400-500. That Drolet Bistro is pricey if thats what you really need. If your looking for a food warming box-stove scenario any large metal lid that will cover the ceramic plate and food without touching will work, even a big deep cast iron fry pan will do.
Otherwise
IMO if you have a welder just take a day and make a lil one out of some random metal scraps and a +10" steel pipe or square tube for the body. Heck Ive seen guys weld up little bot-belly stoves out of two old truck brake drums and steel scraps. As long as its semi air tight to be able to control the draft and you can put fire in it, it will work......
a DIY stove falls to: how safe do you need it and how much do you need to place the blame on a manufacture.
More info maybe helpful interims of esthetics if your after the "look" of the Drolet Bistro