Quite a few years back, I needed to replace my roof.  My FILaw said we could do it.  He was pretty old, so I got to carry all the shingles up the ladder lol.  Well, we did it, and a friend ask what I'd learned.  I told him,  "Here's what I learned.  If someone wants $4000 to roof your house, give them $5000 before they change their mind."