my mom just had a bathroom reno done too and they said a fan wasn't necessary. curious, she priced it and it was going to be over $1000 just for that. she declined. it was explained, they have to vent all the way up and thru the roof, not just into the attic, and that ups the cost significantly.
as far as the static goes. i'd suggest you live with it, keep the lights low, and get a couple of fuzzy cats to enjoy the hilarity.