About how much should I expect to pay to have the main electrical line coming into the house replaced along with a 100 amp panel upgrade?

This depends on the location and complexity of main line coming into the home. Is the main above or below ground? Many utility companies will provide a new drop from the nearest power pole with the permit from the local authority. From a 100 to a 200 Amp panel upgrade could cost anywhere from $2000 to $5000 if there are wiring home-runs that need to be re-run from inside the home to the new panel location. Drywall patching, texture, and paint not included.

3,600, after permits, inspections and labor etc that is my quoting price!

There is a lot to take in consideration! To be honest, it would be highly suggested to have a specialist come out to give you a proposal and exact breakdown of price. That way if you have any questions it can be addressed fully!

My pricing guide jist for the box is a 100 dollars an amp.
Example 100 amp panel is ballparked at 1000 dollars. Etc 200 amp. 2000.
This includes from the weatherhead to the panel all new. The existing is tied into the new service panel.
Permits are 1 dollar an amp so 200 amp is ballparked at 200 dollars for the permit.