Based on your comments, re-read the storage node model, and see that images only replicate outwards from the master to the storage nodes, so my plan wasn’t going to work anyway.
Sure it can. You can have a master controlling FOG server and not have any images on it. A storage node elsewhere can be the master node that holds images. FOG is highly flexible, and you can move it’s larger components (db, storage, web server) around as you like with minimal effort.