I have an ebike and have had it for 4 years and I absolutely love it, but it would be nice if my family would join me for rides, but they rarely do because of the hills, of course. I use my ebike for exercise, but if a hill is too much, a bit of motor makes the effort with it! So I ride my bike. They NEVER ride theirs because it's a chore, not a joy.Anyway, since I got mine (which is a cargo bike that can take a passenger) ebikes have come a long way and my teen son has started riding. He has autism, so he was a late starter, but he really enjoys it, but I'm sure he would enjoy it even more with a bike that could handle hills better. He has learned how to use the gears well.He has a bike that we bought used (Gary Fischer mountain bike I think - I will detail more later if we decide to use that bike) and my partner has a Marlin comfort bike (with a few speeds) and we have my older son's Specialized mountain bike that my partner has often ridden that works well too (all three of them are 6'2 with similar builds). My first question is, does it even make sense to put a motor on an always well-stored bike? Or would I be better off getting a new or new/to us bike to redo? All those bikes are about 8-10 years old.