It seems all the electric setups are pretty new, and ever changing.
I'm guessing not many people have gone down this road yet.
I would look to Elco and their web site for specific info.
I'd be curious to know your set up as well.
Looks like motor, controls, monitor, harness, tilt, batteries, and charger could run anywhere from $6,000 to $12,000 depending on your setup.
Please share what you are doing, and what you find out.
Lots of videos, search "how to install an elco electric outboard" on youtube.