The issue is the 40 hours a week you are working right now. As a PA, you get to clock in and clock out, but once you are a physician it isn't just seeing the patient, there is endless paperwork, phone calls that add on to those hours. I don't think it is worth it in your situation from a financial and from a lifestyle point of view. The entire process of med school and residency could very well take 10 years or so and during that time you will be in the net negative income wise. These are crucial years in your life during which you may be trying to find a spouse, have kids etc. If you invest right now, you definitely will be better off financially. The only benefit of being a doctor is the autonomy and the title. Both will wear off faster than you can count to 10. If you have an idealistic wish to become a doctor, or a passion that involves doing some sort of work only a physician can do, it may be worth it, but if you are thinking from a practical point of view it isn't worth it.
Yes, it's possible. Your GPA, while assessed competitively, is only one aspect of your application. There are many students in our class who had GPAs lower than 3.85. Premed101 can be a little skewed in terms of the applicant pool represented