Re: Getting excited pre-spend my tax return.
Nice lights, the brake lever w/switch is a good idea.
For power, you could make a battery box to tuck one or two 12V SLA (sealed lead-acid) into. Just make sure you leave access to be able to put the battery on charge without having to pull it all apart.
I haven't had any luck bending cranks, myself (only tried once, seemed like it wasn't going anywhere), I have ground a little off the back of each crank arm a couple of times to get the clearance needed. Another option to consider is if you can mount the motor a bit higher in the frame, so it is clear of the cranks to begin with. Off the top I don't know the frame you are working with, so I don't know if that's an option for you but it's something to consider.
Any day that starts with a good ride is already a better day, and a bad day riding still beats a good day working.
My Builds: My Beast
, Harley59's bike
, my Cruiser