He is as poor as a church mouse.
More Hungarian Proverbs:
He gets green way.Hungarian
Today it is enough to do it by one finger, tomorrow it will be necessary by ten nails.
Hungarian
Like Barnard, he tries to catch the heavens stone.
Hungarian
Black Christmas, white Easter.
Hungarian
The sack has found its patch.
Hungarian
The pitcher goes so long to the well, until it breaks.
Hungarian