if Ukraine is like Russia, it's rather easy to get a Schengen multi-visa for a year if you already have a couple of single-entry Schengens in the passport (just

if Ukraine is like Russia, it's rather easy to get a Schengen multi-visa for a year if you already have a couple of single-entry Schengens in the passport (just don't forget ask for it and collect every possibly required document to please the officials). After that it's only 40 eur a year.