Form I-864 Help needed!

[Locust 0]

I'm currently in the process of preparing the paperwork necessary to obtain a green card for my fiancée. We will marry in March here in Germany and I want to make sure that everything is in order, so that we can enter the United States in August. At that time, she will begin an internship at a language institute in Washington, D.C.

Since I am currently a student, I have no "official" means of income which I can use to prove that I can support her. I receive money from my father and money for my G.I. Bill, but other than that, I have no income. I have spoken with my father and he's agreed to act as principle sponsor on the form I-864 Affidavit of Support. I've already began filling out the form and have run into a few problem areas that I don't quite understand. Listed below are the questions I have sorted by section on the form:

Part 1: Since my father will be the only sponsor with verifiable income, should I check box D. "I am the only joint sponsor?" Do I fill out my own form as a "joint sponsor" of the immigrant, even though I have no income?

Part 3: Since there's only one immigrant (my wife), I think I should check box 8. However, the Yes/No question directly below it confuses me. Do I check the "Yes" box?

Part 6: On question 23, does the annual income figure have to be an exact figure, or can it be a rough estimate?

On question 24, should I leave this blank (except for the household income figures) as my father will be, basically, the sole sponsor? Do I need to do anything on lines D or E?

On question 25, I read a book pertaining to immigration for married couples, and it stated that my father could obtain tax transcripts from his accountant for the most recent 3 years, is that true? Do the transcripts have to be notarized?

And finally, does the entire form I-864 form need to be signed before a notary public?

I'll be filing through the consulate in Frankfurt, Germany. Does anybody have any experience with these guys? They say it's supposed to take about 4 months until the green card is in our hands. If that doesn't work out, is there some other option I can persue in order to get my wife legally into the states to do her internship? (the internship is already set up and it's a required part of her studies in Germany)

Thanks for the help, I hope I was clear enough with my questions!