I've had an e-bike for 2 years now on the island and I am not the only one. They are a great option for transportation on the island. I love mine and wished I had bought one sooner. They are considered bikes (no registration fees) here are long as they are REALLY e-bikes (defined by USA DOT as Class 1,2 or 3 with pedal assist). Not a moped with pedals for looks. While riding be considerate of pedestrians, traffic and stay within the speed limit. But that is the case with anyone on a bike, cart or ATV.
Have you considered how you will get your e-bikes here? Airlines will not ship them (batteries) and they are not available in country. Expect to pay up to 50% of the cost on shipping and duty. But I still considered it cost saving in the long run. Plus it is just fun to ride.