...And the biggest problem is shifting the data up to the cloud.
Its not been an exhaustive study, but so far:-
The physical volume of data for just one year is bigger than I imagined. And I only shoot around 5000 images a year...
The Glacier uploader I'm using for Mac does not support folders.
Zipping up batches of directories is OK, but you cannot retrieve a single file from the zip - you have to download the entire file. Which would be OK except you pay for data OUT.
If you set your Mac to go to sleep and save power...the upload won't restart on wakeup...not surprising really that one but I did forget...
So I think there is something here, but its not as quick/seamless as I hoped for. I'm sure I'm missing something to make my life easy and will continue and report back as and when.