Not expensive, unless you want it to be. We can get into accessories and equipment but it's not at all necessary at any level of cycling.
I'll spend more in one weekend at another hobby than an entire year of cycling. And that includes bike purchases.
*Mostly it's expensive for racers.
Last edited by wphamilton; 09-02-20 at 07:58 AM.
Reason: *edited to add/remove snark.