That's perfectly fine.
Maybe you cannexperimemt for yourself? I find energetic and karmic exchanges are extremely complex.
So treat a few people and charge what you think is appropriate, some what you think is a bit too much and some what you think is too little. Chack the results. And then investigate what made for effective treatments and what didn't. Maybe it was about something else than the money. Or maybe you find that reiki indeed works because of a monetary exchange.