True, contamination is a bitch. But it's absolutely possible to get a good harvest with cheap low-tech supplies only: get a liquid culture syringe, boil some grain jars, inoculate them in a still air box made from a plastic tote box, and then mix the colonized grains with some peat or vermiculite and they will grow. I honestly had more issues with growing cannabis than mushrooms: my first bag got contaminated, but the next one gave a great harvest that lasted a loong time :)