Lowes and home depot around here have those aderondak style chaise style chairs (2 piece w/ sloped ottoman) that are a heavy PVC type material that would probably be great to stay sitting in water. They seem pretty sturdy. As for a cantilevered umbrella not really sure as I'm looking for one as well. Again home depot had one on clearance, norm $350 for $200. Of course they were all gone when I went back with the truck
