I find that because we now have CCC both my laptop and desktop are always 100% identical as far as Sonar goes. 
And any extra VST's get installed to both. SO projects always play the same. I've not had an issue with vst pre sets, they seem to be saved with the projects. 
I have always used a very simple system of copy/ paste the project folders to a back up drive and date it. 
I work mostly with album folders which will have around 12-16 songs. So they don't take to long to copy over. I then keep multiple backups that are dated,,, just in case I wish to return to an early version. These day's I just don't bother even deleting all these folders as Back up Hard drives are cheap. But I keep only the latest versions locally on my DAW in the data drive.   

groove

highlandermak
I've been storing all my projects on Google drive. 

 
Does that do a realtime sync of a directory and all of its subfolders?  It might be worth a look.  Can you restore earlier versions of a file with Drive?  I've only ever used it fleetingly to store a spreadsheet or doc.

It depends on your internet speed however with a project file usually being under 5mb by the time I go upstairs it has already synced and can work on it from my bed. I have not researched the ability for historical versions so keep many versions with the date and time stamp. That way if a project goes of the rails I can usually find through my versions where it started going off the tracks. I also use the drive to listen to mixdown versions so once I've rendered a project I can head into my car to hear what it sounds like through my phone with the google drive app interfaced with my Bluetooth.