This is what I started with. The large cardboard box is actually the smoking cabinet. It worked well enough for me to try a few things out, but it's not really a long-term option as the cardboard won't last forever and there's no way to hang, say, a bacon joint, inside. It doesn't help that the box also gets a very smokey smell, so it has to be kept somewhere other than in the house meaning it can get a bit damp. It did the job to start with though and I made some very pleasant smoked cheese and salmon. The trickiest part of using it is getting the tea light in and out of the smoke generator to start the sawdust smouldering. Some people just put a screw through the side, but I ended up making myself a little tool to do the job:
For hot smoking I know quite a lot of people use a kettle-style barbecue.
James