You’re right, but it’ll still cost us TRILLIONS.
Simple solution, East of the Dniepner stays with Vlad- he has the the money to rebuild and the Ukies never wanted the ethnic Russian territories anyway.
West of the Dniepner gets carved up and returned to its historical owners, Poland, Romania, Hungary etc….it might work, however the EU is bankrupt like the US, and as Ukraine is now a 100 percent welfare nation just for survival, establish a DMZ maybe they can become another North Korea.