3. Is there any 3rd option you advise?
بسم الله الرحمن الرحيم
It is better if you wear ihram of umrah from your home or airport. In the state of ihram, if you have the issue of taharah then you need not worry. In the state of ihram, you may also get taharah. If you need wudhu then you may perform wudhu and if you need ghusl then you perform ghusl. In case there is no water then you may perform tayammum as well provided the conditions that make tayammum wajib are found. If you are travelling from Germany to Jeddah and Miqat comes in the way then do wear ihram from the Miqat or from the adjacency of Miqat. It is not lawful to cross the Miqat without wearing ihram. If you go Madina directly from Germany and there comes no Miqat in the way then you may wear ihram from Dhul Hulaifa when you go to Makkah from Madina for umrah.
Allah knows Best!
Darul Uloom Deoband