Complex sentence: Watkins has said he was high on amphetamines while making the film and that only about $800 of the $3,000 budget was spent making the film, while the remaining $2,200 was used to buy drugs.
Split into simpler sentences: Watkins has said he was high on amphetamines while making the film. He also said only about $800 of the $3,000 budget was spent making the film, while the remaining $2,200 was used to buy drugs.