2-3 weeks? Phew.
And 3 TB SSD? That is likely a bottleneck because I think it doesn’t even quite hold all the images, right?
I don’t want to imagine the size of the sparse point cloud let alone the depth maps! Just shooting from the hip I would say that you probably need a much bigger SSD (HDD) and also several (for temp folder, source images and project files).
Let us know if and when you managed that feat! 
Good luck!