"Throw it away on whim..." Mmm, I doubt your husband will see it like that; you know what blokes are like with their cars...
If money is tight, then think very carefully and certainly don't rely on a 20 year old car (even an Audi) for everyday transport. It does have the potential to be a huge money pit but you do at least have the massive advantage of knowing its recent history. I'd say seek out a good Quattro forum, read and learn all you can and locate a recommended independent specialist garage; they are worth their weight in gold.
Good luck, and just think, you could have a motoring icon on your drive soon...
Sadly, this forum is a lot like the eponymous magazine; a bit crap. If you love cars, get onto Google and find a forum dedicated to your favourite manufacturer or model. Don't hang round here too long, it will taint your soul.