You might want to compare the cost you are getting from the electrician to the cost you can buy one for and do it yourself.
If you search that famous auction site for QO surge (check search title and description) you will find units that plug into a Square D QO main panel like a 2-pole breaker. I suspect that you can get one for less than $55 including shipping. It will take you about 10 minutes to install it in a panel.
I have not searched for other brands but the price should be similar.