He has champagne taste on a beer budget, always wanting the best but not being able to afford it.
У него вкус шампанского при бюджете на пиво, он всегда хочет лучшего, но не может себе этого позволить.
Definitions
This phrase refers to a situation where someone desires or aspires to a luxurious or high-quality lifestyle (symbolized by 'champagne') but only has the financial means or resources of a more modest or lower lifestyle (represented by 'beer'). It highlights the disparity between one's aspirations and their actual financial situation.