poor as a rat

have a poor time of it

Synonym of have a rough time of it (especially financially)

house poor

In financial difficulty because of the excessive cost of owning a house, or because the cost of home ownership forms too high a proportion of household income.

lab rat

A student or employee who spends a great deal of time working in a laboratory.

land poor

In a condition of poverty as a result of inability to meet tax payments or other financial requirements for one's land holdings.

On the floor

[Cockney slang]poor

Used of temporarily penniless housewives.

poor as a church mouse

Very poor, to the point of starving or begging; utterly destitute.

poor little rich boy

An unhappy young man from a wealthy background.

poor little rich girl

An unhappy young woman from a wealthy background.