If your are operating or starting starting a new cycling studio, one way you can potentially reduce your costs is by purchasing used indoor cycles. There are pluses and minuses and this decision should be carefully considered. If Schwinn or StarTrac are brands you are considering there is some interesting video content from an expert that you may want to reveiw.
Jeff Wimmer from StudioCycles.com is The Expert on Indoor Cycling bike maintenance. He has a series of 75 YouTube videos that go into great detail on a range of topic including inspecting used Star Trac Spinner and Schwinn bikes so you can make an informed decision.