I did this for a few years with cobbler (https://cobbler.github.io/). cobbler, pxe, bootp, tftp, ansible and friends pretty much solve this problem. In fact, if you know the mac addresses (or ranges) you can fairly easily designate groups of machines, roles, and the like.

Years ago I did this to "rapidly" provision a couple of thousand machines we bought for the stock exchange. You can do most of your testing locally in vagrants, even simulating the networks you need to provision.

You can go a step further and trigger api updates at the end of your ansible runs so that cobbler updates collins (https://tumblr.github.io/collins/) so that you can track inventorying, cm changes and the like. At one point in time we reimaged entire subnets when they lost power - and ran tests against the hardware to ensure the machines functioned post-provisioning.

As far as I know the boursa still uses this system.