This question isn't exactly fair, because Final Fantasy VII had more money flowing in the world's economy. Thus, things cost more but you have more than enough money to meet the higher need. Plus, not like that was the hardest game to obtain money. =P

Titles like VI and under used small amounts of money with small prices.

I don't really take note of how much money I have upon completion, but I remember having 7.5~mil on Final Fantasy Tactics Advance. (My file only has a few hundred hours of gameplay =P)