Using WP for the site with huge volume of data

Hello,

I have a client who wants to build a membership site.

There are 8K members of this association. Each member is suppose to maintain “Work Diary” and also each member will have own individual page which will hold around 5 to 10 pics.

Approx volume of content will be as follows:

1. For diary entries around 3 million (max) data will be there approx
2. Total number of pics (max) be around 100K approx

Besides above data there will be usual content like home page content, about us, news, association rules and guidelines, contact us, complain section etc

My question is Will it be okay to have a site with such a volume of data in WordPress using a membership plugin like Paid Membership Pro ?

Kindly help.

Thanks in advance

Tejas