Can’t promise you much but…

You could maaaaybe look at your State’s Department of Transportation (So like TXDoT for Texas) and find their Bid Tabulations, get an average for 8’ Wooden Fence Repair or 8’ Fence Installation for this quarter, put it in a spreadsheet and multiply it by values between 1.0 and 2.0 (so 1.1, 1.2, 1.3, etc) and that can be your controlling range for price escalation for a private homeowner instead of a mass purchaser. It should be per linear foot.

You multiply those values by your total linear feet to get a total estimate and see if the quotes you get from installers in your area that are within that range, and where they are within it. Look up the companies that you can get quotes from and their reputation if any, and try to pick someone in the median of your range.

If your local municipal entity, city or county etc, has worked with them, that would be phenomenal but those often don’t do private homeowners for clients.

Best of luck.

R.H.