Pricing too easily gets out of date and probably differs with a multitude of variables. I’d say let people contact the installer to get prices instead of having a map filled with old data. The main thing is to use the map for is to find out if an installer exists in your area or where the closest one is. All the other information can be either found elsewhere or come from the installer directly.
I think it is a bad idea to show 2.5 stars by default when the user has no reviews. I initially thought the installer I was looking at only had 2.5 stars.
/opinion