Hi Phil..Things of importance.
1 batteries over 12ah are expensive,and you will need bigger ah if you have rentals..
2 insurance.
3 mechanic, or at least someone with DIY experience of ebikes on hand.
4 luck.
Mark.
I'm curious about your #1 for a rental operation. The length of the usual rental period would dictate what amp/hr you would need, wouldn't it? For example, if you were renting to tourists in, say, Paris (like the OP) and 90% of your customers wanted to ride down the Seine along a designated path to see the Eiffel Tower and then return (assuming this is possible, I don't know, but just for the sake of my question...) and this was relatively flat, and your standard rental period was for, say 3 hours, it seems you would be able to determine what you would need in a battery. Right? 12ah might be plenty, especially if you have several spare batteries, all charged and ready to go for the next customer. Just thinking "out loud" here. I've thought about a rental service as well. As for insurance, most places that rent things like motorcycles or scooters have waivers, etc., or you pay for the added insurance, for the equipment, etc. And luck? The best luck always seems to come with the best preparation, the best research and a great plan. To
@Phil Peyton I say GO FOR IT ! And report back !