Just being on your own property doesn't give you a free pass - otherwise anyone who commits a crime & is being pursued could just make it to their property & be free & clear.
This is not intended to be legal advise or as legal representation. I am a California personal injury attorney . Be aware that every state has its own statute of limitations; and statutes & case laws that govern the handling of these matters.
My colleague states the applicable law correctly. However, if in fact your account of what the officer lists as the basis of his stopping you is accurate, you still may have a legal/factual challenge to the stop; sounds weak. You should consult a qualified, experienced attorney.
There is no "home base" rule in the criminal law - so that part of the question isn't going to get you anywhere. However, under AZ law there has to be an identifiable, reasonable, basis for a traffic stop, and from what you said, there could be an argument that this officer was just fishing, rather than protecting the public by messing with you. It may be worth making the argument or consulting with an experienced attorney to get the stop thrown out.
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