You know what?
As Flayl said everywhere, the fact that we will have less than 25 players in this tournament is unavoidable. However, remember we planned other occasions throughout the whole year, and that the next one will be in winter (which will be a LOT easier for most people, considering the large holidays at that period). We might not have 25 this fall, but I'm sure we'll have our 32 places filled for winter.
That's why I believe we should do it as we originally planned it, on the 4th of October. I'm sure the Megadrive guys will understand the difficulty of doing it the next week, and I think they'll be more than happy to join us in winter.
I prefer a lesser, more laid-back tournament, than a bigger, more stressful tournament (timing).
If you agree with me, now we have to consider all scenarios, which means for example knowing where we'll be if it's in Porto.