Nope. If eligible, you can apply from Germany and move on an immigrant visa - you become a permanent resident upon entry to the US.
For employees, as many as possible really to stand the best chance of having the visa renewed. There's no fixed number though, but you have to show growth. You can't use a L1 if you just want to be a 'one man band' working in the US.
I'd check out the possible IV options first, as the L1 will require you spending quite a bit of time and money before you can even apply for the visa, which may be money down the drain if it's refused. And if you know you want to stay permanently, it would be better to aim for a permanent visa if at all possible.
Good luck.