Yes I know 50M might be a bit too much but one can only hope =)
I wouldn't mind losing up to 50% of my existing gil... but with only 1mil allowed I'm looking at a loss of 90+%
Best advice I can give is set an alt on the destination server and check the MB for comparable prices or items you can make a profit on. Start buying up what you can based on the info gathered. Best case scenario you make a profit and worse case you have items on the MB for a while or get undercut and take a small loss.
Well the problem is that despite there being a fair number of Europeans on the Chaos datacenter, there's plenty of people from NA as well who are essentially being forcefully transfered to a server with higher ping than what they currently have. Sure, free transfers are a great gesture but that's like if someone uprooted your apartment complex and chucked it into another country. They would let you go back for free but they would only let you bring a portion of your things and a small percentage of your savings. So you're stuck deciding between staying in this new place or going back to where you were without a good chunk of your stuff. I think for the people that got transferred like this there should be a special exception and have the gil limit removed or at least raised as they're essentially going to be uprooted against their will (even if they did have prior knowledge of it the transfer caps issue is still a thing).
In general, raising the gil limit should have been done ages ago. (I'd even say outright abolished, but that's a different subject.) But for this, especially.