wordpress capacity

A general question about capacity:
I’ve been asked to do a site. I can see how to do it with custom posts (visits reports and places to visit) and hierarchical custom taxonomies (areas, sub areas and sub sub areas).
But my question is this: I’ll have to link about 2000 custom posts of places of interests with several thousands (about 2000 for the moment and 1000 planned for the next 2 years) of visiting reports including authors of the visits who will have to be able to post their reports themselves. Their report will include also 5-6 pictures, the names of other people (some of them reporters as well for other visits and some not), and a few other custom fields.
Furthermore, there will about 6000 documents, probably 4000 thousands pdf and 2000 images, already stored in a rudimentary database that are linked to the places…
On top this, I will have to manage about a hundred users that will be able to post their reports and create new places of interest for some of them.
Is wordpress strong enough for that ? will I need a special server for this or is it just normal numbers for this CMS. I’m asking because I’ve never made a site with more than a few hundreds of posts and a few pages till now.
Thank you for your help !