MD/NDs make the most money of all but you will spend up to $240,000 for these degrees! MD is next with a $180,000 or more cost, then NDs are third but you will still have to pay a big price for this degree! Osteopaths are right up there too as are chripractors!
These are the money makers in medicine but as you can see the more they pay in salary the more they cost in education!
Master herbalist is ok if they have a customer base to sell thier herbs and can acquire a decent clientel! But its not an easy feild to make a buck .
There are other types of alternative medicine that you can be trained in ,but if you want to make a good living you will need that degree from a good school, no such thing as a free lunch!