The inspection report and how knowledgeable your inspector is will report issues on building issues small or large. Depending if it is a minor or a major issue will help the negotiating process.On most inspections we have conducted we have found issues that needed repaired to satisfy building codes. In some cases we have saved buyers up to approx, $20,000.00.
For these inspection companies that try to do two or three inspections per day, all I can say is slow down. If a report is written correctly and the inspection was conducted properly, we can only conduct one residential inspection per day in 6 hours. Commercial inspections is a whole different story. It's not uncommon to spend several days on small commercial reporting.And weeks on large commercial.
The more education and background in building technology a inspector has the better inspection you will receive. Not all inspections are the same. We have seen property inspections that were done with major items missed. Those items will cost the new homeowner thousands of dollars.
Do your research on the inspector you decide to use. The home inspectors that have been builders are often very knowledgeable. However builders still may need additional classes in building science. Just like building science professional need additional education in buildings.