Carpenter’s Halloween (1978) had a low budget even by 70s standards iirc & it became one of the largest & easily recognizable horror icon franchises ever. the original film still holds to this day & is underrated as hell. carpenter spent something like 1/3 of the budget on just a free-moving camera dolly that was new tech at that time & had to cut a bunch of corners with the budget bc of it. that risk ended up being the right one. the netflix doc “the movies that made us” did an episode on it & it was super interesting