In fact, this hobby called boating is not all that rosy.
Unless your boat is big and all-weather, if you discount the days with adverse weather conditions and personal commitments, you may end up doing boating just once or twice a month.
Unless you hire a boat-boy, you may break your back doing the cleaning and maintenance chores for the boat, ending up serving the boat more than it serves you.
Unless you are into DIY, be prepared to spend tens of thousands of dollars on repairs and maintenance each year if you want to get reliable repairs from someone respectable, such as the agents of the engine and the boat. The bigger your boat, the more costly the fuel, repairs and maintenance.
Also, be prepared to be stuck with the boat for a long time because when you want to sell your boat, there will not be many people out there who will want to take it. This is particularly the case for big boats. This is why most big boats are company-owned.
So it is true that you need a deep pocket to do motor-boating.