The best answering service for a home inspector is one trained specifically on inspection work, integrated directly with ISN or Spectora, with live coverage during the windows real estate runs (evenings, Saturday mornings, Sunday evenings), and stable enough operationally that the team handling your calls in month 18 is the same team handling them in month two. Generic services may be cheaper on the price page but typically cost more on a cost-per-booked-inspection basis.