If you're willing to make the investment, VMWare Fusion is great for that. Though of course you still have to obtain a copy of Windows afterwards. I've addressed this by taking my ancient, ancient Windows laptop and running a program provided by VMWare that creates an image from your physical machine. (I've forgotten its name at present).

To make the creation process go faster, I usually restore the machine to factory defaults. That way, the registry is smaller and everything is much smoother.

I've used Wine.app for that and it worked great. VirtualBox is another free choice, but it requires a windows license.