For normal travel distance, 70 miles one-way isn't normal for me, $150 first hour, $100 each additional hour on .5 hour minimum increments. Some clients may have choked a bit at first but when I found really screwed up repairs, they came to realize it wasn't such a bad deal after all. Obtain list of exactly what they want inspected as related to your report. Make it clear that unless the repair is obviously wrong that you are looking for conditions for which you would not have reported a deficiency in the original report. It is not a total inspection. You cannot be responsible for materials and workmanship used in the repairs.