Brucolac, on 05 March 2012 - 07:11 PM, said:
At the same time, GGRM has never really dwelled on the economy of his world, so it is hard to say what a dragon buys. The best example might be in D&E over hundred years ago where he sells a decent horse for 4 dragons and spends 80% of that on a suit of armor if I remember correctly. The Hound and the archer that won the tourney, were able to go through 40,000 and 10,000 dragons respectively in a year. Arya has a scene were she sells Bolton's horses and gets robbed, but I forget what she was asking and what she got. It is all pretty vague, and now we have this premise where economics is going to make someone a contender for the throne again. It is kind of like turning an extra into a lead actor at the last minute.
The Hound and Anguy are not great examples, though I do largely agree that the value of money in Westeros is hard to pinpoint and possibly inconsistent.
The problem is that people who come into a lot of money often blow it. In fact, we know Anguy did exactly this. He talks about going to Chataya's and drinking the finest wines, etc.
With the Hound there is also the problem you alluded to.. he did have some of that money left but it was stolen from him and we don't know how much.
On top of all of that, there is the biggest enemy of people who are bad with money and/or bad at math: gambling. (I actually gamble for a living so I have quite a bit of experience in this area).
Gambling is extremely common and we already know the Hound partakes. Assuming that Anguy does is no stretch at all. Any huge sum that goes missing quickly likely has the stench of gambling all over it.