True - your comment reminded me of Cube; that was done in 3 weeks, with budget of $350,000 CAD (according to wikipedia). Another favorite of mine - Primer = 5 weeks with budget of $7k.
The cube was not “done” in 3 weeks. Maybe they shot it in 3 weeks, but there were years of pre-production, and at least months of post-production. (According to wikipedia.)
Saying that it was done in 3 weeks is like saying that windows 11 was done in 45 minutes, because that is how long the compilation lasted.
> with budget of $350,000 CAD
“50% of the budget as C$350,000 to C$375,000 in cash and the other 50% as donated services, for a total of C$700,000. Natali considered the cash figure to be deceptive, because they deferred payment on goods and services, and got the special effects at no cost.”
edit: looking at others, Pi - 4w and $130k