Pricing 6RV trailers and 6 pickup trucks w/ detail

I received a call last night from a Gentleman located in Sterling City Texas, who has a crew in West Texas, working on one of the many pipelines they are building in the area. -I keep hearing something about the Permian Basin being in the middle of an Oil Boom, but I have yet to see it…- (Kidding).

Anyway he would like me to wash the exteriors of the Travel trailers they are currently living in, as well as clean and detail the insides of the pick-up trucks, and I was thinking about throwing in a package deal for all of the work, ( in about the $500-600 range) What are your thoughts?

BTW Sterling City is about a 40 minute drive one way.