Center motor, so if anything, the load is higher on the chain than normal bikes. I am not sure how much more than 5k you can realistically expect for a lifetim

Center motor, so if anything, the load is higher on the chain than normal bikes. I am not sure how much more than 5k you can realistically expect for a lifetime for an ebike drivetrain regardless how you maintain it. You need to clean the bike anyway between the customers. If a quick wipe with wd40 gives you 5k, I am not sure if the extra miles on the drivetrain justify the extra work and extra cost of a fancier maintenance.