Photography equipment is expensive, I think everyone knows that. Basically with any bit of equipment you could usually buy a good point-and-shoot camera. And same goes with the studio gear. If you're planning to make a home studio with "official" gear you could easily end up spending several thousand dollars. But on the other hand, you can easily get started with far less expensive setup if you're willing to use gear that is not meant for photography.
This article gives you few examples what you could actually use as studio gear, how to use them, and if necessary, how to build them. I will share you my experiences on how different things have worked for me. These aren't only options, just some examples. With some creativity you can probably think of better gear for some specific jobsm than I have. Just remember one princible: there are no style points given for the setups. If it's outside the frame, it doesn't matter how DiY it looks as long as it gets the job done.