I am holding EU Blue card from Finland for more than 18 months. I got a job offer from Germany and I satisfy the requirements of Blue Card from Germany. As a specific condition my future company wants me to join orientation training on their HQ in Switzerland starting from 1st of Nov. I will be doing roundtrips from Zurich to Helsinki for two months. Then I will be relocating to Dusseldorf on 1st of January. I know that I need to make a fresh Blue Card application from German embassy. Also I find following link very useful about changing coutries while holding blue card.
Here my questions;
What is the best timing to apply for the EU Blue Card when you consider my specific situation? I believe I can enter Switzerland with my current Blue Card. So can I delay this application around 1st of Dec. or even after 1st of January?
If not, then I apply for German EU blue card as soon as possible. So how long will it take to get my Blue Card? I heard embassy can issue some temporary work permit while I am waiting for new card? but no guarantees.
If I get my german EU blue card before 1st of January, what will happen to my residence in Finland, since my children are going to kindergarden, if residency drops they lost their kindergarden. What is the relation between blue card and residency?
If I dont get my blue card form Germany after 1st of January, can I rent a house in germany and get a residency so that my children can continue their kindergarden?