What do YOU wan't to do? How long do you want to do it for? Is the investment or possible loss to the investment, at resale time, going to reward you with having owned and enjoyed your boat for that time? If you think YOU would like to own an electric boat more than a diesel boat, how much is that enjoyment worth to you? Is it worth enough to spend the money on the change over? Is it worth enough to understand that you might have to accept a few hundred or a few thousand dollars less for your fun after a few years? Obviously that's the question you're asking here. I don't know the answer. I haven't read anyone else's response that makes me think they know the answer. I'm just trying to put your question in terms that might help you answer that question for yourself.
Good luck with that. If it makes any difference, I personally, would think more about what I want in a boat than what someone else will want when I try to sell it to them. Unless, that's why I'm considering the change in the first place.
-Will (Dragonfly)