Location: Washington State
Tony's right, blogging about celebrities pools you have built could be a negative for some people. There are a percentage of people that would want a pool built just like some celebrity had, and other people could care less, they would want their pool to be unique, different, and better, that's just human nature.
Blogging could be another way of promoting more information on the pools, such as construction material, estimated time, different types of landscaping, different types of lighting, etc., there's many directions you could go in.
My thoughts aren't on page rank or SEO, but on offline business promotion. The web pages are just a bonus, where people can see what you are offering in their leisure time, and then get motivated to give you a call....