250,000 dollars is about Lv5,000 by value.
Movement to the frontier is a mainly government sponsored affair. Why would anyone want to buy a starship (if they could), it's expensive, and expensive to run. They'd be much better off buying passage on an existing ship (or letting the government pay for them on a colonial transport). They can get a person and equipment to a frontier world with change out of a million USD equivalents.
Where in canon is that exchange rate? Is this for the US now, or in the game?
I realize that France is the superpower in the game, but an exchange rate of 50:1 does not seem possible for the American dollar. 3:1 or 5:1 you could convince me of, but not 50.
If this exchange rate is for actual current US$, it's not a helpful comparison. Compared to people 300 years ago, I think it's a safe bet everyone on this board has a lifestyle that only the upper classes could have come close to.
Of course, if you carry that back, compared to people 5 or 10 000 years ago, we all live like gods...