Had a GPS try to send me down a closed road last month. I just pulled over and looked at the old paper map I keep in the glove box. Fixed it in two minutes. You gotta double check the tech with your own brain, it's not infallible. Relying on it completely makes you miss obvious things right in front of you.

That hundred bucks also works as a great filter for people who don't value your time at all. They'll argue about the fee but expect endless free revisions. It saves you from a much bigger headache later.

Did you read that article about the contractor who started charging a consultation fee? It really cut down on the tire-kickers.