After the single player campaign is completed, the player info screen no longer displays the net worth needed to reach the next level, but instead lists the amount of money you must earn to reach it.

Planet Toledo is a campaign-only base that cannot be reached once the campaign has been completed. There's better equipment to be found than what the Order supplies anyway, you just need to find it.

There are no more "storyline" elements to be found after you complete the campaign, but there are a number of systems that you haven't discovered. There are a few intruiging secrets waiting for you, and finding them is half the fun!

you mean that wiered Alien Jump Gate thing? with the planet hovering above the ground to the Nomads Gate thing

Reguards.
Server557

By earning, you really mean that you need to really -make- money, not have it?

Correct. If, for example, your next level requirement is $15,000, then you must make that amount of money, either through missions or looting cargo. Sometimes, when the next-level requirement is fairly small, it will simply read "Mission", meaning your next mission--regardless of monetary reward--should allow you to level up.

You could have a problem that others seem to be finding as well.Over the past 6 months or so I've seen alot of posts from people who can't get past lvl.20-21.There may be a bug at those levels that stops you getting any higher.Listed below is what your net worth should be to move up a level.

211397, 20
245220, 21
285906, 22
328791, 23

If you net worth is more than what is required then your stuck.All I can suggest is delete the autosave & go back to an older save point

Also, the $$$ you earned during the Main Story impacts your end level (when I completed the story, I was instantenoulsy promoted to level 35). Just earn 17k more and you will level up.