I don’t want to play the bad guy… however…
Lending (for no money) a couple of eFoils to brainy students is easy. They can think, predict, react, …etc.
Renting is another story because the legal consequences of an accident would be a disaster for you and your family.
Receiving money in return of a service is another story.You are bound to succeed and the people who have rented must go back home safe.
If you rent something and an accident occurs with a device that has not been certified (CE for example even if Switzerland is not in EEC) you will be in big trouble. You have to see what happened with chinese eBikes in case of accident or fire. They have to be certified first in a national (US) or european laboratory to decrease/master the risk (propeller, battery, etc)
So this sport is too young for a renting practice. Even if there are a lot of expectations from the general public with a huge potential market, the schools need to wait a few months and step back.
The only mature device today that could be proposed for renting is the LIFT eFoil. The problem is that it is so young that it hasn’t been certified yet. It is just a question of money and time. Q4 2018 probably.
Today, (July 2018) the renter of a lift eFoil in a developed country that would be responsible for a cut, burn or lost finger or toe would face massive legal issues. Imagine what that risk is with a immature month-old chinese product !
The Lift eFoil thread - info for the DIYer