My car is on its fourth active tank, first failure was under previous owner. I had it replaced twice under parts/labor warranty, it seems to last just under two years. A tank costs 800+ and not sure where the other 1200 come from, the OP quotes 2k? Each time car is in for two days to get it fixed. I can't believe there is a wait of several weeks involved....

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2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior

Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
2006 4.8iS Le Mans blue/cream int./black headliner, SOLD in 2012 sadly...

Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.