Alyce,
You can put a regular belt driving motor on and keep the spoked hand wheel very easily. Those parts are available as new aftermarket or used OEM from many sources.
If I were to seriously consider converting it to electric, I'd hunt up an OEM motor, wiring, foot controller, bobbin winder / belt guard and hand wheel. That could be expensive.
To convert it to a potted motor could be a challenge as those motors are no where near as common as replacement parts as the belt style. You will also have to get a special hand wheel due to the gear drive.
Joe