I heard about devbox [1] but I haven't tried it yet. Perhaps it could suit your needs. Back in the day I used "Norton Ghost" to create a full image of a just-installed windows just in case I needed to go back in time. Windows includes a snapshot feature built-in but I did not really trusted it. These days you can use a "sysprep" tool [2] to create a similar system snapshot. Make a partition and keep everything you... - Source: Hacker News / 3 months ago

For provisioning the machines base image consider FOG it uses PXE and can remotely provision dozens of machines using multicast. Source: 6 months ago

Same. We set up 1 device how we want to, then use FOG to clone the other devices. Source: 6 months ago

With standard computers, I usually deploy something like the fog project and automate the process over pxe with scheduled reboots. I guess you could do that as well with your VMs but that seems overkill. Source: about 1 year ago

You could setup a PXE server and automate installs. You could also clone them and reapply the image as needed. https://fogproject.org/ or lookup CloneZilla both are open source. Source: about 1 year ago

You can use cloudendure.com, bought some time ago by AWS to make it's technology free for any_to_AWS move, agent based that will copy bit-by-bit and you can test vm on the other side before final cut on source side... Source: over 2 years ago

That being said, I'd still vote for the rearchitecing part, at least to the level what you were describing. If you do decide to lift-and-shift tho, we just completed a big migration with CloudEndure and I can recommend it. Source: about 3 years ago