WCAG2.0 AA Test lead

Recently I've been put in charge of testing and implementing WCAG 2.0 AA compliance into our websites (PHP CMS based). However, my experience with this is pretty limited. My questions are:

Is Mac VoiceOver sufficient enough to test?

Should I test with JAWS on Windows instead?

Any tools besides the VO's I should be using while developing and QAing our products?

I use the Wave tool as of now to check code, but not sure if there anything else that could help this process speed up.

Thank you for your suggestions and help. This is a big step for us and we are hoping to create a standard where accessibility and compliance is 2nd nature to us and our devs.

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