Detachment booth own construction for trailer

Moin too, I’m looking for opinions. As a festival fan, I’ve been thinking for a long time about building a storage or sleeping cabin for my little 650 KG trailer (200 x 125 loading area). Theoretically, “only” a mattress has to be in there, if I can charge my cell phone dry, it would be “on top”. There are many materials, I’ve been thinking about wood and about aluminum…and at some point, of course, I came up with plastic. e Idea to build a booth from 2 – 3 bubbles of IBC boxes? Simply connect to each other, seal with bitumen liver or tape, paint on it, window, door and ventilation in…ready? Of course, the details are still missing, the idea is still fermenting in my head…but basically? Greetings Lighthouse