I got a C302 early on, from Amazon. I guess I was lucky, because I heard they can't keep em in stock. Don't cancel your order, it'll come eventually. Of course, if you are not patient, and you have a Best Buy in the area, you can get the Samsung Chromebook Plus. It's in stock, at least here. And if you wait a few more days, the Samsung Chromebook Pro will be out.
I'm not sure I'd try to do any serious CAD on a Chromebook. I've used Crouton. It's not perfect. It feels like running beta software. Before doing Crouton, I would probably try loading seabios and then either Ubuntu or Mint. I haven't tried that yet. Then I might try Freecad. But your best bet for CAD is to keep an old Windows 7 Box, offline, just for running one of the myriad CAD programs that are available for Windows. I do. Having said that, I am going to look at CADtouchfree someday... time, I just need more time!!!
The Brix. Isn't that cute? I've got the i5_6200 running Ubuntu on a 4K, and it's gorgeous. There's room in it for a SATA hard drive, but i am using a M.2 drive instead. Really fast boot times.
I think the way you have to think about a Chromebook is that it is a web appliance. A browsing appliance. Keep it around for the quick browsing. Keep it next to your desktop. Surf the Chromebook while doing real work on your desktop. You get the idea...
Just for grins, here's a pic I just took of my C302...

Mike...
P.S. Did you ever consider using onshape for your cad work? You can access onshape from windows, mac, linux, chromebook, etc...
AzAv8r wrote:Thanks for posting! My C302 order has been in limbo on Amazon for a month, and I was contemplating cancelling it. I'll hang on.
Oh, and I also have a Gigabyte Brix, just bought another for my Mom, and will replace mine when the Kaby Lake Brix' (Brices?) can actually be ordered. And then there are the 8 other computers of various flavors and OSs I have running around the house (excluding the special-purpose devices).
Wrt Chromebooks, have you found anything that can be used for CAD? I was thinking I might be able to run Sketchup under Wine under Crouton, but that's a pretty-optimistic set of redirections. I ordered an X86 Chromebook to maximize the likelihood of zero-effort compatibility.
The quality is remembered long after the price is forgotten, so build your teardrop with the best materials...