The rim should easily take you that far.

Then you'll decide to wait until Spring. Then you'll be busy and figure that if it made it that far, you might as well keep it going a bit longer. Having gotten more than you expect out of it, you'll decide it doesn't owe you anything and you don't care how long it lasts, but you might as well leave it alone until it craps out.

If you adopt that attitude Murphy's Law will kick in, and the rim will outlast the bike. It never fails, once you're mentally ready to replace borderline stuff, it refuses to die purely out of spite.