Do you want to use DSC for the VM Configurations?
Do you currently use the Convert-WindowsImage Script?
Have you heard about the helper module Labillity?
In the 3800+ word Blog post I go into detail about how to use Lability to build out your Lab Environment and how this module is structured to make this a much easier process that can allow you to build Labs in a repeatable way using DSC for the configurations.
Grab a coffee (or two) and set aside a few hours to go through this and test it for yourself.
Read more about this over on http://blog.kilasuit.org/2016/04/13/building-a-lab-using-hyper-v-and-lability-the-end-to-end-example/