PGA

This depends on the country. Peru, for example, requires it and it has to be notarized.

Is it just me, or is everyone not having any luck getting the page to load when you click on the Unread Content link? All else seems to be working ok.

Just suggesting you have a plan B, that's all. You can try as we did: we were way over the required amount for assets, all liquid as water, US based, and all documented very nicely. In the end, the CO wouldn't consider them and insisted on a joint sponsor anyway; not a huge deal since I had prepped my sister well in advance for that possibility. When all was said and done it added about 2 or 3 months to the process. Important to point out too, embassies seem to vary widely in their behind-the-scenes policies so what's true for one applicant in one city can be completely different for another applicant in another city.

Once NVC receives your case and creates an account (in our case our NOA2 was received by us on 10/07 and the NVC case creation email was received on 10/10). Once your case is created at NVC you can start uploading documents. Now, if you want to delay everything just don't hit the submit button and you can delay. From the email - IMPORTANT: If you do not log into CEAC or communicate with NVC regarding this immigrant visa case for a period of one year, by law the Department of State must terminate your visa application. In your case, and if I'm understanding your question correctly, you can go to the US now and secure the job and domicile (keep in mind that there is no absolute guarantee of a visa being issued) and wait to upload the i-864. Alternatively, you could submit everything to NVC if you have a good idea on visa processing times for spouses in Germany and that would give you a rough estimate of how much time you would have between submission and interview; you would have to get the job and establish domicile within that time and bring an updated i-864 to the interview.... which may be a little risky.

Also, don't forget about tax returns for at least the last 3 years filed by the US citizen....

You can certainly try to use assets but based on my own personal experience, definitely have a joint sponsor lined up. We were hoping to use just assets and, despite having plenty, they gave us the 221g at the interview for a joint sponsor; fortunately we had one lined up, however reluctant, and it did add an additional couple of months to the processing.

Just be cautious with this as the plan...the view on liquid assets seems to be hit or miss (some consider them, some don't and may require a joint sponsor regardless).

Yes. Make sure you continue to maintain or establish proof of domicile (pay US taxes, maintain US driver's license, US bank accounts, etc) before she files; also have a joint sponsor lined up.