Originally Posted by WaynesWorld
I first looked at beach legs but as aid above it when the boat is at rest and they sink in a soft sand/mud, they would need large feet/pads to prevent from sinking. Its ok if you have a regular mooring but in my case i will be moving the boat from place to place.
Well I don't want to quell your innovation but people have been sailing and beaching yachts for hundreds of years, including on muddy bottoms!
The fact you plan to move from place to place means you presumably won't know the exact details of the sea bed in each location and the sharp hazards that might lie underneath - your inflatable (or "fillable") idea could be really expensive if it fails suddenly and puts your boat on its side into incoming waves or just crashing onto a rocky bottom.