Vacerator, the movie you’re thinking of is Motel Hell (1980). It’s mediocre camp with an overlay of weird horror and organic, locally sourced cannibalism. It’s like a drag-queen version of The Texas Chainsaw Massacre (1974), but it falls far short of the mark.
*** SPOILER ALERT ***
The last line of the movie about sums it up: “I’m the biggest hypocrite of them all. My meats... I used preservatives."