chance would be a fine thing!

Chance would be a fine thing! (British, informal) — Было бы не плохо; Твои бы слова да богу в уши.

something that you say which means that you would very much like something to happen but there is no possibility that it will.

He said I could do it in my spare time. Spare time? Chance would be a fine thing! (CIDI)