How long should a clearaudio maestro v2 last?


I listen 10-15 hours per week. Since there's no user replaceable stylus I'm concerned about having to replace the whole cartridge every year or so. Anyone know how many hours the stylus lasts on one of these? Thanks!
dhcod
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Keeping the stylus clean and applying Stylast before playing a side may extend lifespan. I do this! 
I’m in the same situation. I’m figuring two years and trading it in. Clearaudio allows a generous trade in value to keep you in the family.