Might be the dumbest thing I've ever heard.
I mean I get why it sounds weird at first but this is basically just a co-working retreat with structure, people do these all the time for coding bootcamps or writing workshops. The hard part is finding one that's not absurdly expensive or tied to some specific skill. Have you looked into smaller hubs in eastern Europe or southeast Asia, sometimes they run informal sprints like this through local nomad groups
You didn’t need to try and top it