Wie viel würde der „Umstieg“ Weißrusslands auf Europa kosten?

It doesnt matter. There is only swamps and shit when you cross the border with Kacapia. Nothing you want in your country.

The reality is that Belarus will only join the EU once Russia allows it and Russia will never allow it. Whilst I understand why FSU countries are keen to forge closer ties with the EU, the halcyon days of the early 2000s are long gone and EU membership is increasingly a burden rather than a benefit.