I have found that the longer you have been in this business, the longer your inspections will-or should take. I typically take about 4 hours for a 2000 sq ft. home as well and I am fine with that. If the length of time for an inspection is reducing your $/per hour below an acceptable level- raise your fees. We, as an industry- are grossly underpaid for the services we provide. Fees have essentially been the same for the last 10 years. I would rather do 1 house per day and make the same money as the guy doing 2 houses per day. 1/2 the liability exposure, 1/2 the travel time and distance, more free time. I could speak at great lengh on this issue- but - its usually a waste of time.