I used to grow several different types of mushrooms. You would probably never make up your investment on a button mushroom kit because they are so cheaply available. On most of the kits you can get several flushes but they usually have to go through a dormant phase. If you want to continue to fruit these mushrooms you have to either propagate them through spores or tissue culture. To do that you need to have a pressure cooker or autoclave, test tube or petri dishes and agar. If you are interested in mushroom tissue culture I can point you in the right direction. Shiitake, Oyster, and Lions Mane are the gourmet mushrooms I used to grow. I once grew Reshi mushrooms for a kit as well. Let me know if you are interested and i will go into more detail.