Anonymous wrote:This is not about an only child. The advice would be the same.
This.
If you have the means, there is no reason not to allow your only child to pursue their interests. There will undoubtedly be some that they lose interest in, but that is just part of the process. Instruments are very easy to find used and I would imagine the same could be said for most athletic equipment. Also, remember, you don't have to invest in getting top of the line equipment until they've demonstrated a sustained interest in the activity.
I grew up an only child and got into equestrian sports, so I can certainly sympathize with the potential costs you may incur by allowing your child to pursue their interests.