mvenneta wrote:
I may be getting in over my head - but how hard is it to do?
Depends on your level of mechanical / electrical ability. The all-in-one package is obviously easier to deal with from an installation point of view and it might let you get going in as little as half an hour plus battery charge time. At the other end of the spectrum, my brother built a 1 kW front drive fatbike from parts, including re-spoking his wheel, working out the mounting location for the battery, controller, sensors, and wiring, and then doing some simple setup work so it was not diabolical. But, it took some decent effort and problem solving on his part.
Less is more.