If someone does not want a price for the whole job complete, they can buy their own grass and have Juan or Pablo put it down. I do not think you can get a price per brick laid from a mason or per board nailed up from a contractor. Either people want a pro doing the job or they want someone else. This all relates to lowballing, everyone calling themselves a "landscaper" when they do not know beans and fostering this mentality in one's clientele.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738