really, if they are just looking for someone to cook what they give them... then who cares if they are idiots.. I would advise them of how much meat they will have all said and done post cook. 100# hog and 50# butts will give you at best 60 pounds. what I charge WITH MEAT for that would be $700. 6 butts plus the pig - would also come with sauce. if they are providing the meat... I've do that too.. my time worth $3 a pound raw weight cook. which is about the difference between the meat cost and my time/effort to get the product.
hope that helps...
ex-Stickburner converted to Backwoods gang (Gen2 Chubby and Party), UDS, Homegrown 250 gal Offset.