it worked for hong kong, guantanamo etc. Sell the whole Ukraine for a $ to be redeemed on par in future. Russia will halt all crap in 0.001 seconds.

One Weird Trick / Dictators Hate Him!

C'mon man, do you actually think that this will work?

not the border, i mean arbitrary land, say 50 miles, along the border.

For a simple sale/loan the land would remain Ukrainean.

Just like if an American buys a house in Russia, it won't mean now that USA can militarily defend it.

Every piece of land has actually two owners: the sovereign nation and the civilian/company "owning it" as understood in regular speech.

You are confusing an individual from a sovereign state. If a state buys it, it belongs to the state where the constitution protections are enforced.

Yeah, 2 owners like Guantanamo? Ukraine can relinquish control for a known time, even a year. Russia would dare not start war by crossing another country. If there is no will to defend, there is no solution.