class racing as a business?

Ok, I know that we aren't going to make money ... not the point. But we need some business/tax advice. I'm a HS math teacher/coach and my wife is an elementary school principal. We've both been educators for 20 years to give you a rough idea of our income. We race a Pure Stock C5 in IHRA and recently purchased a motorhome. Is there a tax advantage to starting our own business and writing off racing expenses including the RV? Any advice on the topic would be helpful.

Thanks!

Wendy & Scott