I don't know why the OP opens this thread just now, because according to the website:
https://zerorealestate.ch/de/
"Dear guests
Due to the current situation and lack of resources, the Zero Real Estate project cannot take place this year. We look forward to welcoming you next year - where the only star is you.
Your Zero Real Estate Team"
I mean, it's funny, but right now they don't offer their services.
I guess they will offer it in summer only and when there is a good weather forecast, otherwise you have to be a real freak to go there. With good weather it can be an interesting experience. Like camping but without a tent and in a more luxurious way. I imagine that there will be some property nearby to store belongings and that they will have something designed for security. Anyway, that's Switzerland, not the Bronx.
https://zerorealestate.ch/de/
"Dear guests
Due to the current situation and lack of resources, the Zero Real Estate project cannot take place this year. We look forward to welcoming you next year - where the only star is you.
Your Zero Real Estate Team"
I mean, it's funny, but right now they don't offer their services.
I'd say it's more like camping without a tent 
rain, wind, snow..
Privacy, thiefs, bears... You're basically food on display!I guess they will offer it in summer only and when there is a good weather forecast, otherwise you have to be a real freak to go there. With good weather it can be an interesting experience. Like camping but without a tent and in a more luxurious way. I imagine that there will be some property nearby to store belongings and that they will have something designed for security. Anyway, that's Switzerland, not the Bronx.