depends a fair amount on your financial status and needs; if you were to start a company, you'd almost definitely need to go into a hardship deferral on student loans. This shouldn't be much problem, but you'd probably need some backup source of income or plans for a place to stay for maybe a year or so prior to beginning to earn any salary. (written as a person married to a entrepreneur who has started quite a few companies)
Another thought would be, as you'd mentioned, to go into consulting, or possibly look into a large health organization such as Kaiser Permanente -- consulting firms would have a formal training program and offer a liveable salary, at least the top ones. I've heard great things about some of the larger health ins. and health coverage type firms; salaries seem good at Blue Cross/Blue Shield, Kaiser, etc. I'm not sure how an MD would fit in here, but as a experienced business person, starting salary for a non-manager level person w/deep non-healthcare experience was in the mid 70's to mid 80's range.
It sounds like your interests are more on the business side; keep in mind the lack of certainty in that world as to job tenure -- my firm is laying off 20% (many thousands) now; two of the people laid off were among the hardest and most effective workers I knew who had 5+ years' seniority. It's a discomforting feeling knowing that something similar may well happen again in a year or two, and then again a few years later. Another thought would be to train as a physician and then do that part time, say enough to earn 100K per year, and use the rest of your time to start a consulting firm, lead a hospital group, etc. A friend who is an MD has done this for years.