OP - that is just awful for you ! I agree, you must get good legal advise for your business and yourself as soon as you can. Protect yourself and your daughter first above all else.
If it was me, I would make him answer my questions. If he doesn’t, then I would say that he can either be honest and discuss this properly as sensible married adults or you separate and when he comes back, it will be to a petition for a divorce with visiting arrangements for his daughter.
How on earth he could make a decision like that when you are married with a child is beyond me!
He is clearly a man who has to be in control. Take it back whatever you do- DO NOT let him dominate like this! Be strong for you and your DD. Stand up to him! Be clear about what you want. Or - you do this covertly, let him go and arrange to see a solicitor after you’ve waved him off on Monday morning. Change the locks, pack the rest of his stuff and send it to his family.
Either way, this is evidence of a man who sees himself as virtually single, independent of you as a couple and does not have the interests of his daughter at heart at all. If he insists on going, he should lose his family as clearly he does not care. He is pushing your boundaries to the limit! Stop him doing that- be firm with your boundaries; be firm, assured and calm. But don’t let him make such a big decision alone without consequences - you are half of this marriage.
He sounds utterly selfish and immature - almost as a free man going off on a jolly and travelling, not a married man with responsibilities and a child.
I don’t like offering advise to people I have not met or not know personally but this situation is dreadful and as usual, it’s often the woman left stranded with a family to care for alone.
Get advise, financially sort yourself out so you’re covered and LTB - next week! God only knows what he might get up to in Germany ! Sorry to say that but if he’s prepared to leave you for 12 weeks maybe more and your marriage is already faltering - he may take advantage of everything Germany has to offer.
There may be another reason he is not answering your questions- like someone else has suggested- something secret may be going on. I know I sound suspicious, but his behaviour most certainly is! He is not being honest with you and by freezing you out of very important decisions, he is feeezing himself out of the marriage.
Please look after yourself and your DD. Good luck OP, I will be thinking if you in my thoughts and prayers. Keep strong, don’t let him win.
Find a loving, decent caring man who wants you and loves you. Don’t put up with being used. Get out and start again if you have to but don’t accept being treated badly or unfairly.
I know that you might want to stay because of your daughter and your home stability etc; but if you do, at least make sure you are financially organised and prepared. Know your rights too.
He will do this again and hurt you again. Sending you flowers and hugs x