I am sure they do/did but this still doesn't match resulting reality. By financial swings he does, he has 1-2 mil euros of disposable cash, on top of that vast amount of flats. Judging by his age and career path, he had to amass most of it (80-90%) within less than a decade.
No German bank is going to give you 100% mortgage (in fact 110-120% for taxes/fees/additional reconstruction) when you already have 10 properties mortgaged in exactly same way. You also don't build any cash reserve like that, owning properties is always more costly than financial projections make it so.
At the end it doesn't matter, good for him (apart from everything that makes a man the man) but his vague background story as told simply ain't true, and folks were eating all that till I came along and thought about numbers for few seconds.
