Thanks all, I've got it now

So here is my update, let me know if I'm right on track.
So here I have expanded slightly in my original home land, and also acquired some dutch land.
I am also the Emperor, so far a second time round I believe in succession, with Saxony as a vassal.
Here are my royal marriages. As you can see I have a PU with Burgundy and Bohemia. Now I have a question about PUs. sometimes the game will tell me that on my monarchs death I will inherit Burgundy for example, but then a few years later it says that the PU will just continue, and it keeps jumping between them seemingly randomly. Can someone explain what decides whether I will inherit or not?
And finally my budget. I honestly do not know how best to put the sliders for Austria, how have I done so far?
So there is my current game, so far going well (I think). I have one question though. If I understand culture shifting correctly, I need to move my capital to a province with a MAJORITY culture in my empire, so since I'm planning on forming Germany, should I refrain from taking too much land outside of the German culture group I need for Germany? I mean the GH came knocking a few years back and as you can probably tell from my first image, Hungary was nearly destroyed by them, but were finally beaten back by them and Bohemia, but I didn't take a single piece of land from the GH, should I have taken some?