In general terms a property will be quoted at 10 to 12 cents per square foot of the structure. Some inspectors get this rate higher by charging in for the options and some even charge for mileage. Both of these criteria take the inspector's time and thus are justified in some sense. Sometimes the inspector is asked to return to re-inspect a property that has repairs made based on a previous inspection report. These re-inspections usually cost less than the original one because less items are covered with the same level of detail, thus the inspection time is less.
Most inspectors have a minimum charge for their services.
My prices are easily calculated to meet your needs. They are not intended to hide anything or to give you, the client, any unpleasant surprises.