As a hobbyist I'm always amused when another hobbyist says they've "invested" money in their hobby.
I have not invested a dime in my hobby. I have however spent thousands.
The definition of invest: to put (money) to use, by purchase or expenditure, in something offering potential profitable returns, as interest, income, or appreciation in value.
As I said, I've spent thousands over the years. Never consider it an investment.