I use Zwipes for interior/doorjamb/engine bay cleaning. I would not use them on paint though. I would highly recommend getting some higher quality MF for the paint. You don't want to go through all...
For 11k you could get a pretty clean 2005-2006 Mini Cooper S. I owned an 05' and it was an extremely fun and pretty darn reliable car. Thats where my money would be going.