I installed a 50lb Power Drive with Copilot remote on my kayak with a group 29 battery. Only needed to buy bolts. Overkill? Maybe
I was able to get out yesterday for a couple hours and try it. Top SOG 3.7mph. Draft is about 1ft, less if I give up steering. I was able to slide into a flooded strip pit that the real boats can't get in. Look what I found!