While 250k isn't really that much gold if you're clever about earning it, it would be incredibly difficult to make that amount of money while everyone else is also trying to scrape it together.
The AH would suffer; prices would be driven down both due to people trying to undercut each other and sell more and by people simply trying to save money, farm spots and mineral nodes would be camped to fuck, it would do serious damage to the economy. This would be compounded by the fact that the ways you could make your money would be reduced, putting everyone in competition with farmbots. For example, people make a lot of money with pets and other vanity crap, that would fall drastically when everyone is trying to save money, so would boost runs. The only dependable markets would be the basic profession items; gems, enchants etc and all these markets would be fiercely competitive, think undercutting within 5 minutes of posting.
TLDR: This would fuck up the economy big time.