We are setting up a WSS site collection for a project coming up and I
have a few questions regarding how it should be structured.

Each client of our has their own site. Some of our clients have
subclients, so the taxonomy looks like this:

Client ABC - main site
>> ABC_SubClient 1
>> ABC_SubClient 2

Each subclient needs to have the same documents on their sites (rules,
policies, images, etc). My thought is to store the documents on the
main Client ABC site. However, each subclient will also have unique
documents as well. Where do I store these? I'd like to store them on
the main Client ABC site as well, so the user can just go to one
location to get info. But I would like to show a link to the
subclient's documents somewhere on the subclient site. My thinking was
to set a property on each document about which subclients use that
document.

Is this possible, or I am thinking about this completely wrong?