That’s wildly inaccurate, even as a rule of thumb. Upkeep (excluding storage, which varies widely by location) shouldn’t be over 10% of the purchase price, unless the boat was really cheap or the boatyard doing the maintenance is crooked.

Talking US rates here, I have no experience overseas.

I have considered an e-bike. I believe I might be safe on one in some situations, but not as a daily driver. As mentioned, my balance is very poor. I can manage a stand up scooter for short distances. But the penalty for a fall at my age is far too high, and so anything on two wheels is really not going to be acceptable. Thanks for the thoughts though.

Try this when you are in your 70’s and come back and we’ll chat. And bring a cure for my chronically poor balance on your way over.