[earlybike]

Before setting up companies in a different countries than where you live: This can get very messy and you should either have the company in the country where you live or live in a country which is very tolerant (tax-wise) about having companies in other countries.

On a secondary note: Germany is the worst country to incorporate: bureaucratic, expensive, tax offices are expensive and stuff is complicated, worst privacy regulation to come (from a company perspective), Labour is expensive compared to their skill level and English skills.

One good thing though: since share transactions are done with state notaries there is more safety when doing them and less need for lawyers for simple transactions. For more complicated transactions with higher funds it gets expensive again. The Articles of Association must be German, the rest can be in English.