First, if someone has 30 to 40 hives, they are sideliners, i.e., they are doing some selling. Maybe not "making money", but at least defraying the cost.
Second, many hobbies can quickly add up to serious dollars.
My dad started playing with trains when he retired (N-gauge). Over the years he spent over $10k on his toys.
My girls have horses. The horses didn't cost much, but when you throw in a trailer, a truck to pull the trailer, fences, stalls, tack, feed, vet & farrier bills, etc, it adds up.
My son's hobby is scuba diving. That's pricey.
I have a co-worker with a boat. When we talk about it, it makes me glad I have horses!
Other people spend money on new cars, hot tubs, vacations, big houses, big screen TVs, etc.
It's all a matter of perspective and priorities.