Personal websites generally lack significant Page Authority (inbound links and related factors).
Official larger business website sites (skiloveland.com, etc.) have greater Page Authority, relevant domain names and long domain age; national sites and media
articles about ski areas have even greater page authority. Karl's pages must concentrate authority into a single
domain to be competitive, even for long tail search terms ("Loveland Basin Avalanche Bowl").
Some minor reasons that a single domain is better:
1.) Domain age is generally better for a single, more general domain. For example, karlkelman.com was
founded with no particular view to become a large site with several hundred pages and multiple categories.
Like most sites, it evolved into a larger site. Obtaining a separate domain ("loveland-basin-skiing.net" or similar) for a category that evolves
years after the original site would mean less domain age.
2.) Less expense and upkeep. A single domain is one domain renewal, one hosting account, and can
often share many CSS (Cascading Style Sheet) and Javascript features from page to page.
If you currently dominate search results for your entire line of products and product type (think Hewlett-Packard with printers - they are a good example
of a company that's improved their web presence with subdomains), separate and subdomains may enable you to expand your domination of
search listings - in addition to the top two spots in search results (search engines generally only give two listings to one domain), you may be able to
be #3 and #4 as well.
This is a strategy that only works if you have overwhelming online dominance with respect to your industry and market area. If you have 100 units of Page Authority,
and no competitor has more than 3 units, your Page Authority can be divided among several pages, and each of those pages may still outrank competitors.
