I work at a boat rental facility on a saltwater lake (pumped in by the S.F. Bay). We used to rent crummy, crummy mtn. bikes that got thrashed by renters and the saltwater. The multispeed hubs w/ deraileurs were to difficult to maintain in our fleet along with the other misc. repairs to sailboats, kayaks, etc. I'm thinking of a beach cruiser. I thought of Workman Cycles; but, they're steel and a bit pricey. Is it worth it? They are heavy guage frames. Any other suggestions?