It sounds like you got sucked into the black hole like me, lol. I'm just starting my build as well, but research, research, research.
There is a boatload of sites for parts and tools, but the information seems hard to track down IMO. KDBfans.com is where I bought my "starter kit" I might suggest looking there first. It was easy to find in-stock options for a case/pcb/plate combo.
If I can offer any advice, build and price everything on paper first. Don't forget to add in the cost of lube, shipping, waiting times, TOOLS, etc.