Nobody said it wasn't possible. They just recommended other avenues.
I also would recommend a virtualization solution. I have Yosemite Public Beta as my primary OS on my iMac, and now I have Windows 10 in a virtual machine. Windows 10 runs acceptably on 1 GB of RAM. 3 GB is acceptable (while testing) for OS X.
But it should load just fine either on "bare hardware", or through Boot Camp. Note that the Boot Camp Assistant in OS X will refuse to work right with a version of Windows it doesn't know about - but it will install just fine once you reboot.