My wife just started her own LLC as a psychotherapist as well. She gets paid mostly what insurance reimpurses so that part is kind of static. However, she does a few other things that aren't paid through insurance and has some been working on getting her pricing right. What I would say to you is that you start charging more and set up a sliding scale based on need. Increase your prices but include language about if there is a financial need this can be altered. She has done it for a few group events and had only a few people ask about it. She then alters their cost based on their need and she even let a few people attend for free. It allows you to raise prices for those who can afford it and still increasing access to those who might need it.
The thing to remember here is that you do your job better when you are less stressed. Overworking and being underpaid means that you are helping fewer people or not as effective helping the people you are seeing. Ethically you need to take care of yourself to help your clients. Its the same logic as self-care. If you aren't there to support you can't support.
There is nothing more dangerous than a powerful man who belive he is doing the will of his god.