Lazlow, at this point ANY and EVERY electric drive for small craft counts as an "oddball propulsion system". It will be expensive, and it will be experimental, and if you change your mind and try to sell the boat, it may very well be a total loss because it is an ODDBALL system, no matter how well it works out.
If you're just plunging into boats, I'd really argue that you want to make CONVENTIONAL choices, so that if it doesn't work out it is easily put back on the market.
And once you're more familiar with boats, who knows, maybe electric driveswill have built up some kind of track record. Right now? Best suited for cruise liners and submarines, and some odder craft.