Every missed call is a job somebody else booked.
The lead offer
The phone gets answered after hours. The lead gets a reply within minutes, automatically. The review request goes out after the job without anybody remembering to send it.
Why this one is small and fast
This is the smallest thing I install and the fastest. One recovered job usually covers it.
The honest note
I am not going to tell you a number here. One recovered job is worth what your average job is worth, and you know that number better than I do.