Just realized I never did answer these:
Caveat: I haven’t played it myself; for various and sundry reasons, I try to keep my gaming to the Xbox, these days, so I’m going purely off the description, et. al., on the web site.
That said, based on it, I imagine you’re quite correct in saying that they’d probably get on like a house on fire, indeed. (After all, government by purchased office is hardly an unfamiliar concept to the Empire – just look at Eävalle.) A lot of cultural compatibility, of course, depends on how much governing the federation of merchant princes mentioned actually feels inclined to do, but plutocracies are hardly the government type most likely to want to be all up in everyone’s business, so unless there’s a non-obvious/unlikely cronyist nightmare hiding behind the scenes, it doesn’t look like there’s a problem there.
Second, on paragravity and using it to attain orbit, a real simple answer: you can’t. Even if you solve the obvious problems, like providing the energy, and (since it only operates between two paired units) completing the circuit between two units one of which is presumably in geosynchronous orbit over the other, there’s a more fundamental issue.
Namely: achieving orbital altitude is only half the problem. To stay up there (bearing in mind that orbit is essentially falling around and around the planet), you also need orbital velocity sufficient to ensure that you keep missing the ground. Hiking yourself up there paragravitationally gets you the former, but not the latter – and, note, everything that’s already in orbit necessarily is moving at orbital velocity.
So the first thing that’s likely to happen after you reach orbital altitude is a fatal collision with something already up there moving at umpty-thousand mph relative to you. This will knock whatever of you survives out from between the paired paragravity units, at which point in obedience to that harsh mistress, real gravity, you will plummet immediately and directly back to the planet, with another fatal collision – and a lawsuit – awaiting you at zero altitude. (If you aren’t hit by something up there, the same plummet awaits you just as soon as the paragravity units are turned off, or you voluntarily move out from between them.)
Basically: you will not stay in space today.