Your "other angle" has clarified your intent for information.
I was unaware of an ISO rating and have been searching for the information for Collier County to no avail at present and is an ongoing venture.
As far as how many inspections are to many in this regard, it has been determined that 25 is the standard limit for each inspector for Collier County. How this was determined is unknown at this time. At this time I would venture in guessing that the ISO rating may have had something to do with this.
As far as the population for Collier County, this information has been located at the following link:
http://www.colliergov.net/Index.aspx?page=262To summarize from the previous link, Permanent Population of (2010*) *2010 Census Estimates Unincorporated Collier County
285,170, Collier County Total 321,520
Peak Season Population (2010**)**2010 Staff Projections Unincorporated Area 345,236 Countywide 389,149
I will edit this post when I get more information