As stated I would like to have an easy way to transfer my saves between my different computers. It seems to be NOT so easy at this time unless I missed something?
You aren't missing anything. Currently you have to copy the save folder back and forth, along with copying the cache files and blueprints back and forth. If you forget the cache files AND blueprints then you will lose any completed blueprints in the factory you haven't spawned yet along with losing blueprints that are currently being produced in the factory and the resources. If you forget these files and load the save once without them then the game auto deletes factory files from it's side. It's extremely difficult to play from multiple PC's right now. I REALLY hope the devs resolve this one day, and the sooner the better......