There's still a lot of grumbling about upkeep costs, but what is it now, something like 14M a week?
For something decently kitted out, for exploration for example, it was about a billion a year. Not sure how much that is reduced by no longer needing a shipyard to store your own fleet, altohugh it was one of the more expensive modules that I would have wanted.
So a figure between 500 million and a billion per year. Still rather pricy for me, especially if taking a break from the game so not earning any credits, just losing them through not playing.
The X milllion per week doesn't sound too much, as long as you are playing for a number of hours every week. It soon adds up if you take a break though or are doing activities that don't earn much (or any) money.