Nice man. Ebiking is fun on my daily commute to work. I say that you would need a min of 500W of motor for your weight. HV is the way to go, so 48V and up.
My big SUV is purely a family vehicle now and the Camry for long distance commutes/errands.
There is always that cheap Ebay kit to start you off with your Ebike build. 14S lipo and you are good to go.