content: So there is the smell which carries for miles and pissess off  neighbors, you need lots of compost to germinate the spores.  Despite growing them in (basically) shit, you need to keep a very clean operation lest you have an outbreak of some disease that kills your shrooms or makes them unsellable.  If they are just for you to eat, maybe a small one would be fun, but if you are going to have an operation to be profitable, then you also have to get one with grocery stores who will want specific weekly (or even daily) quantities delivered.