You are too optimistic but you still need to supply some convincing specific numbers.

I wander where do you get from those 200-300 cycles batteries and how much they cost ?
LiPo at high currents seldom lasts more than 30-50 flights... Please post the type of the batteries,
their price and the currents you are draining from them, as well the www-page one can get them
from. Sure, LiPo last in my LapTop up to more that 1000 cycles but that is a very different story.

Meanhile lets calculate what the real (!) case is in the following size of engine i.e. to get our
talk to a real case, then we can see if we are talking about the same thing:
- If I suppose to replace my OS.91FX with electric, I would be in fact replacing 0.5 liter of fuel
per flight with electric charge/discharge. In favor of your suggestion I would think the cost of
the electricity is 0.0. Then for half liter Methanol with 20% Castor in it I am paying in total about
less than 0.45 USD, lets take it to be even 0.5 USD. Then for 300 flights it will cost me about
150 USD. Do you think electric can get even near that and also how much the Hardware will
cost compared to the 200 USD for .91FX, assuming that it should deliver prety similar power ?