[Gem]

There are no ethical answers because ethics exist as dilemmas, but if we say the nature of a man's will determines his morality, we don't need to talk about specific actions. For example, cutting someone open with a knife is bad with the intent to harm, but good when a surgeon does life-saving surgery.

I'd generally argue against providing spiritual services on condition of payment, and I'd also say you have to be selective with clients and not accept anyone.

If we follow a principle of generosity, that means to give without expecting anything in return. Then it would be a donations base, but contributors should understand that they are not giving for what they got for themselves, but supporting the service so it is there for someone else. The money can cover costs, and any excess should be put into making the service better/more available, but once a profit motive in introduced, it distorts the intent.

You can't reasonably do spiritual work for a price because the conditions of service aren't payment. It's still exclusive, but the conditions of exclusion are whether this client is mentally ill, emotionally unstable, obsessing, reliant etc. That should be a hard 'no'.