Ahhh! That intention is much clearer now.
Based on your description, you are already providing value in a number of areas. That's awesome that you are a basketball nut...so am I!! I love hoops.
Let's look at it in terms of "psychic income". What I mean is, the income representing the reward you receive for the service you render. When it comes to your volunteer work, I am guessing your reward is a genuine feeling of happiness of being able to help kids. Measure your reward based on the satisfaction you receive.
When it comes to earning money, you most certainly deserve to be financially compensated when you provide a service. Again, in your case it is basketball coaching/mentoring.
I think you need to separate your service into 2 groups. The type of coaching you do as a volunteer and the type of coaching you do as a professional.
Since it is money you are after, it makes sense to sit down and figure out your target market. Who is in a position to pay for your services. What is a fair market value based on the service you provide. Handing out business cards is one thing but finding true buyers who need what you provide is a totally different "ball" game
Who is your ideal client? My guess is you should target the parents of kids who have a deep passion and future aspirations for college/pro basketball. They are the one's who would be willing to invest in your services.
My $0.02