If it's going to take a full day I would think $500 is pretty good considering.......
1 Man @ $25 x 1.45 = $36.25 x 8 = $290
Materials @ $75 (?) $ 75
Hard Cost $365
Now pull out money for rent, insurance, utilities, equip, taxes, advertising etc........ doesn't leave much for profit.
Offer him $350 and a Gashole Hat
Randy