I've had very little maintenance for my tubeless tires. Although, I don't hassle with it myself and just drop by the LBS for a squirt of stans sealant every few months. My LBS only charged me $20 to set up tubeless and they don't charge me anything when I stop by for a Stans fix Of course . . . I usually buy something else when I drop by. I think we can all agree that being in a bike shop is a lot like a kid in a candy shop.