My brother and I made something similar out of bambo. We made 5 ( what we call "Boo Logs") which are 10 pieces of boo (16' to 18' long) tied in a bundle. We face 5 pieces each way, which gives us about a 10" diameter in the middle, with the limbs of the boo being on each end. We tied it on top of 2 buckets of cement, where the log sets right on top of buckets. Did not tie them to the buckets until we were ready to put the in the water. We could only take 2 at a time, and it was a boat load, seeing how my boat was only 17.5'.
These were just starting to be productive, when Health Issues has kept me off the water. We put them out and marked them in my boat. My brother has only been able to locate 3 of them, unless he takes my boat. Boo is hard to find, even with side or down scan.
With them being 16' - 18' long, we made them run from shallow to deep. One end will be in 12' of water, and the other might extend to 20'. This allows us to fish them from Spring thru most of the Summer and into Fall. Have just got a good report from the Dr, and hope to be back on the water soon. The 3 my brother can find have been productive for him. We are probably going to this type of condo, due to it covering a variety of water levels.