I just took over as manager of a large rehearsal studio where I discovered a room full of misc. gear (amps, drums etc.) the studio has collected over the years that was abandoned by tenants who couldn't pay their rent. So all this gear belongs to the studio now. I want to start a back line service for my hourly rooms and maybe eventually transition into gear rental but I have no idea what to charge. I'm also interested in the best way to mark the gear (especially cables and mics) as belonging to the studio to deter theft. Any ideas?