Characters
24 hours a day, seven days a week. No job is too big, no fee is too big.
— Peter ‧ Ghostbusters

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker advertises round-the-clock availability and a willingness to handle any job, then twists the familiar sales pitch by saying no fee is too big. The joke shifts from dedication to customers toward enthusiasm for their money. Unlimited service and unlimited charges become part of the same boast.
Context reviewed