From what I've read about it over the years, it's not as reliable as a good image/restore utility.
As Digmor stated, what the OP is doing does look like a lot of work. For my simple home-use needs, I cold image when I feel it's time, usually twice/month on average, using Clonezilla for Linux and Macrium Reflect free for Windows, saving the images to a 1 TB external hdd. That's it. Both these image/restore utilities are ultra reliable.
It's stated in my post #1 below
4) Software: Macrium Reflect Home