Richard, I just weighed a single ceramic tile I have laying around, 1 ft. square. It is 4lb. 0.6oz. If you can calculate your total square footage needed, perhaps that will give you some idea of the weight for real tile - minus the approx. weight of any existing carpet and other flooring you'll remove, for total effect on your coach. Vinyl tiles weigh a little over a pound apiece, but may be a smidgen smaller dimensionally, 11 3/4" X 11 3/4".
Joel