Here's one (as if more are needed).
I grew up in a small farm, two houses, Grandparents main house and ours. Granddad bought land from a fellow who had 2500 acres, handed down to him, generations going back to original King II land grant. That fellows parents had slaves who's descendants lived on part of that land.
Granddad was a Physician, everyone thought he was wealthy and so took advantage of him. (I was with Granddad when he died at home...heart attack at 87, he was still working in then in 1985, charging $5/ office visit!).
Granddad talked the main landowner to give the slave descends land ownership...just 1/2 acre lots where their houses were...which he begrudgingly did. One delivered stone. Granddad would get stone from him which they would spend hours putting down, hand raking, then he would get a high bill.
Dad finally said since the quarry was just 2 miles away they'll deliver it, set the gate for, say, 2"...drive along spreading it. It was a better job costing way less than half!
Point is, people will take advantage sometimes, especially if they think you have money. I've heard that from lots of contractors.
Bottom line is find someone trustworthy, tough to do sometimes but that's paramount!!!!! TRUST