In your own words — what are you building, and what's the site like?
Please tell us a little about the job.
Screws drive straight into the soil, so what is down there is the main thing that can slow a job down. Check anything you know about. "Not sure" is a perfectly good answer and it will not count against your quote.
Irrigation, an invisible fence, a septic field, a gas line to a grill, or anything else you have put in yourself.
Heads up: this form saves submissions once the site is live on Netlify. Opened as a local file, the send button won't reach the server — that's expected.