Approach for Drupal/Gallery2 home remodeling site

I have successfully installed Gallery 2 (v2.3-RC1) and the Drupal 2 Gallery Integration module (6.x-1.x-dev) on my Drupal 6.4/Gallery2 test site.

The site is a home remodeling site that is to include a photo gallery of user submitted projects (mostly submitted by contractors). A contractor can have multiple projects. Each project can have multiple photos, videos, or computer generated graphics (e.g. blueprints).

Each project would have some meta-data, e.g. contractor name, address, cost, materials/brands used, date completed, etc.

The projects would be grouped by type, e.g. decks, bathrooms, kitchens, finished basements, etc.

Each photo/video/graphic would have a title and description.

Each user should be able to see and edit his projects. All users (including anonymous users) should be able to view all projects.

Am I correct that there is a "root" album that can contain any number of subalbums, and that this main album tree is public for all users, and that users can create a public album in the tree or a private album saved under that user. Is this correct? I need to be able to define a tree of albums (the main home imrovement project types and subtypes) and have contractors and home owners create an album for their project, and save it in the correct place in the tree.

Any thoughts on how to do this?