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cut your coat according to your cloth, cut your cloth according to your means (only buy what you have enough money to pay for ) - жить по средствам; по одежке протягивай ножки

Of course we'd love a huge expensive house, but you have to cut your coat according to your cloth.
(CIDI)

Meaning: said to emphasize that someone should do the best they can with the limited money they have

see also
[live in a small way]
[stretch your legs according to your coverlet]
[draw in one's horns] - 2