Odd that you bring this up. I’ve been looking at Ukraine. For all its drawbacks, it has some very positive aspects. The main one is the cost of living. Ukraine also has a cheap labor supply and the natural resources to build most of what it needs in country if push comes to shove.
As the largest country in Europe if you don’t count Russia, you can pick an area with the weather you want. Emigration and permanent residency isn’t exactly encouraged. But it is doable depending on your background.
Even with a minimal monthly social security check, you can have money left over.
One of the problems is that with a collapse in the US, there probably won't be any social security checks and any other annuity based upon US investments and assets would also be in danger. If you have truly independent means and assets, then Switzerland is likely to survive a US and global depression IMO.