hello V,
answers to your questions please.
1) Is not possible. But i dont knowen why you wanten a 100% percenter..so to speak as you said "We have quite a bit of equity" usually you will geten 60% from bank if you non local buyer (you must to put 40% equity in the deal or so forth)
2) answer to questions 1 answers question 2 if you understanded me

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3) I dont know this but i will checked my sources and resources.
Lastly, berlin already going up day by day as i am in the business and i am seing the changes , steady by steady which is better than fast risings, if you camen berlin and just see and take it your time you will find the right one investiment for you. Good luck you are looking good in the right direction. we have now buyers from sweden, denmark, uk, ireland, poland, spain, russia and so on and so forth and more is comen.
k.