[jaclaz]

>I'd pay a monthly membership fee of around 50 Euros for this.

Yep, but how many hours are you going (or expect) to use this space (monthly)?

I mean 1 hour/month, 1 hour/week or 1 hour/day.

Moreover would you envision it as "reservation based" or "First Come First Served"? [1]

More or less one of this cells could be a half-length shipping container, roughly 6 m x 2.50 m, which (has to be verified) probably also works as a Faraday cage.

[1] I don't know, but having to be there at a given hour or arriving at a time when all boxes are alredy taken could add to the stress.

[DocTomoe]

> Yep, but how many hours are you going (or expect) to use this space (monthly)?

3-4 hours per week, similar to gym use (which costs be about the same).

> Moreover would you envision it as "reservation based" or "First Come First Served"?

For practicality reasons, I guess best would be a mixed system: have 80% of your rooms reservation based, 20% on a reserve "first come, first serve" approach, which I can get by randomly showing up and paying a premium fee.

> half-length shipping container

Make them sound-insulated and put on a climate unit, and I am fine with that.

[jaclaz]

So, given that you would be the "perfect average" user, 12-16 hours/month for 50 bucks, for some 6*2.5=15 sqm.

24 h open 7/7 at 2/3 occupancy would be 30x24x2/3=480 h/month, so 480/16=30 users/half container, or 30x50=1,500 US$/month.

To cover the 24hx7=168 hours/week (considering holidays/illness/whatever) you will need 6 or 7 people in the role of reception/cleaning/etc., if costs for each are 5,000 US$/month, and we assume to spend no more than 50% for personnel, you need 70,000 US$/month of income, so 70,000/1,500=47 half containers. let's make them 50 (one will be used for reception, one for storage, and one for common toilets).

You will need 50% more area than the area occupied by containers (for corridors between them) 50x6x2.50x1.50= 1,125, or between 1,000 and 1,500 sqm for this "camp".

At first sight is doable, the income is not different from a hotel room (at 100US$/night and 50% occupancy) but the building costs are far smaller, a half length container can cost, including the modifications around 10,000 US$, let's make it 12,000 including furniture, whilst a hotel room is more like 30 sqm at 2,000 US$/sqm or 60,000 US$.

And of course I didn't consider the "gym effect" of people paying the monthly fee but never showing up, and the "premium fee" you mention for a "no reservation".