A couple of problems you may face. I have a 125cc gas scooter and it weighs 225lbs. I am 230 pounds and it takes me to 45 mph with ease. 2 scooters at your size needed would about exceed your hitch limit and I don't think you will find a 2 scooter carrier that is going to meet your needs. You will need a scooter trailer and at your size at least a 150cc gas scooter. Your wife could get buy with a 50cc one, but might not be able to stay up with you. Do you have motorcycle experience? If not you will need to look into a beginners riding course. In Washington state anything over a 49cc bike requires a motorcycle endorsement on your license and that requires a riding course, about $150+. Not just like riding a bicycle. Good luck in your search.
2017 Grand Design Reflection 303 RLS
1997 GMC Sierra 3500 Dually