Seems that styrofoam insulation may be the one of the easiest ways to go, as it only requires 2.2 to displace a metric ton, and each only costs $12, so you could float a ton for just $27.Ya, to make them live longer, can wrap them in heavy duty construction bags for UV protection, $1.80 and some plastic ropes to hold them together and use for interconnecting $2-$4. So can float a ton for under $40.
Two of these styrofoam-logs can be used as the pontoons for 1 or 2 person catamaran. Though it would also require a frame to house the pontoons.
Also what I find most-interesting is considering that these are relatively “temporary” but they can be used to make dry-docks, to build more permanent ferrocement structures. for instance 3 large styro-logs should technically be enough to be drydock for the phi boat size 2, whose hull weighs a ton.
If we build on the water, then it’s easier to launch, simply disasemble the styrofoam logs, and the boat should slide into the water.
Another benefit is that styrofoam is pretty much oblivious to punctures, and most impacts.
We can even haul our boats up for the winter, and the logs could be opened up and actually used as insulation material.
Once I get the dinghy down to the lake, can make a drydock to hoist it up for the winter.
I’m expecting that the drydock will cost somewhat more than the floating-trees alone, as there is a frame and pully system involved in having the drydock, as well as potentially security including chains and locks. so the frame and pully system together might end up pulling the price up, though hopefully can use drift, dead and scrap wood, to keep it as low as possible.
preferably it’ll be anchored out to deter average beach goers, and be effective as a drydock, has to be far enough and stable enough to keep through large storms, while being close enough to be reached by swiming, canoe, or whatever means of transportation is available to use it.
outfitting it with a sail or kite and paddles may be a good idea, in case it needs to be moved.