good luck. this is one area where even the top authors in the field do not make a great living. See Don Milo Duquette's latest book and bio on the flap he explains that away.
However, I do know of people who burn out their connections with the otherside very quickly. they tend to make a great living for a brief time or disappear after starting to have problems with accuracy with their top clients.
The curanderos that I know from the americas get by ok, even the very popular ones. But there is a lot of shennigans there.
it is better that you find a way to help people solve a problem.