My question was more about how much stuff you want to buy and how much time you want to spend. Because you can get really into mushrooming and propagate your own spores, and keep mushroom cultures, and replicate them, and all that.
Or you can buy kits, put them into logs, and harvest for 2-4 years and then buy another kit. Just depends on how much you want to grow and the time vs convenience factor.
If you're starting out, a kit is a good way to start. There's a supply shop here in Tacoma or Olympia that's rather popular, don't recall the name. They sell kits for $40 or so.