Helping others in nonprofit settings is always an option, though making money at high and sustainable levels is not always a certainty, especially when you're first starting out. It depends on the nonprofit model you're working with and the type of service provided.

In my experience, it's better to start with a niche group and focus on providing a more robust service to a select group. Gradually others who fall outside of the target market will also seek you out as you build your positive reputation within your niche target market.