If you buy the common reliable gas engines, and stick to timing chains, you really don't have to do much. Our 4runner has 260k miles and hasn't ever had anything done but engine oil, trans oil, and differential oil. Trans and diff oil will still be done on electric cars.
I have a 300k Ford F250 gas that also hasnt had anything done basically.
And while for trucks the electric vs gas is huge, my Chevy Volt costs per mile about the same to operate on gas vs electric, because electricity is $0.46 a kwh in my California region.