What is supposed to be the minimum budget for an independent film, in London, marketing expanses included?

by infomatique
Question by Ho Ho Ho: What is supposed to be the minimum budget for an independent film, in London, marketing expanses included?
Let's say it's a movie with less than 20 actors.
No special effects.
No travel abroad.
No car chases.
No stunts.
No luxury properties
No expensive clothes

But yes of course, budget includes salaries for actors, for technical staff, catering and housing for all the staff, transportation ( bus and car rentals), computers, cameras,

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