The Estrel in Berlin is WAY TOO large for EF's needs and also way too expensive. But I wouldn't mind - It's just five kilometers away from home
Maybe you're right, but...
Just as a reminder ... you're looking for an alternative location for 2012 and coming ... that means you'll have to go looking for place for 1500-2500 people. We already neraly hit 1000 this year, and we will definitely already go beyond that next year in the Maritim in Magdeburg again.
So, if Cheetah is right, the Estrel might be the only option left, because it seems to be the only hotel in Germany with so many beds and function space. Furthermore it's specialized on events, so it should handle EF easily.
Charon told me, that the Estrel wouldn't be more expensive than the Maritim and he explained it with the Estrel having problems to fill up all the beds and therefore they probably would be happy to have an event like EF going on in their house. Dunno whether it's true or not, but it could be worth a try.
But I doubt, that EF will grow that much anyways. I think that the maximum is reached now. If the spiral of more furs -> bigger hotel -> higher prices continues, more and more people will skip EF, going to smaller and cheaper cons and meetings instead. Maybe EF will end as a second anthrocon with 80% rich US furs.
I talked to some furs and also read comments in forums about EF16 being their last EF or only visiting it in the future to sell stuff in the dealer's den. I already missed some familiar faces at this EF and I am afraid, that there will be less next year.
Don't get me wrong, I still love EF, it's THE event of the year for me, more important than christmas and eastern together, but hearing and reading the complaints of other furs I doubt that EF will grow far beyond what we had this year.