Smush Pro on 10,000 plus images

Hi All,

I've loaded a site for a client with just over 1200 pages, and originally it was 5700 images.

My first mistake was not setting WP up to stop producing its multiple image options which then produced 3 new image sizes so now the site had a little of 15,000 images and jumped to 10.1gb

I've tried a number of plugins to remove the duplicates, even selected them by hand in the uploads folder, but as you can see on the image i've loaded its getting out of hand.

The major effect it is having is on the page loading speed, and given its size, the site is too big to take advantage of the CDN

Any thoughts on how to reduce the image or page loading speed please.