Can I create custom fields and assosicate additional information with entered content?

Hi guys,
am sure you'll either say this is really to do or is so daft that it falls outside the realms of possibility.

I'm messing about with making a hotel site - each property has content, star rating, price point etc. Getting content in is simple, is there anyway I can set alter the 'add content' stage to have some sort of custom fields where I can assosciate the star rating and price point outside of the content to reference in other places in the site.

i.e. so I can order all properties on a page by star rating etc, or pull in price points dynamically from a feed rather than updating in the content as I go on.

As I say either really simple or really stupid.

Cheers