I think the nature of having a stable like this is that you can not only afford to buy such a collection, but also the means to maintain it. This owner made it very clear that he did not buy these cars to sit, and he actively drives each of them (OK, the Alpina is his wife's car for the summer and he is holding back on the Jag). He has such a vast fortune that he has staff dedicated to maintaning all of his motorized playtoys, and each was in absolutely pristine condition. The cars are shipped to whichever of his houses he is staying, and he helicopters/flies to his destination.
If this were ArchitecturalForums.com I wouldn't know where to begin in describing his house <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />
Jay