With 12 systems it may be simpler to setup an MDT server to deploy with. To do this right you should have a MS Volume License key and then create your reference image (master, golden, mother, etc) with MDT. For 12 systems I would stop there. If you were going to deploy more than 50 systems per year then I would take the next step and setup a FOG server. Capture your golden image with FOG and then deploy from there. If you setup FOG and your golden image properly you can use a single golden image for all of your hardware fleet. Since you are using Dell hardware, they (Dell) made the driver collection part pretty easy for you.
Don’t let the MS VL key scare you off. You only need one per OS type you are deploying. That will give you reimaging rights that the OEM license doesn’t. Meaning if you purchase 1 VL Key for Windows 10 Pro you can deploy an unlimited number of Windows 10 Pro where Windows 10 Pro was already installed on the target hardware via a preexisting OEM license. To purchase into the MS Volume license program you need 5 points. The Windows 10 Pro VLK counts as 1 point, just add 4 other items to get to your 5 points (Like server client access licenses, you can never have too many of those and they are pretty cheap).