I don't have specific examples, but I've heard of foreign doctors who came to the US and successfully made it through medical school. I've also heard of a similar story where someone opted for a PA program due to it being a much shorter path and they seem content. Your story sounds unique and you have a lot to offer from your experiences, you can definitely make it through successfully if you keep grinding. Being 30 is not a problem, many of my classmates started med school in their 30s are are doing well. As long as you (and your family if you're married/have kids) are prepared for the many years ahead of you and you can maintain decent grades, then your goals are perfectly feasible.