“Were Joseph and Mary a wealthy couple?”
The Lord (to Moses): Speak these things to the children of Israel:
If a woman has conceived and gives birth to a male child, she shall be unclean seven days. On the eighth day, the flesh of the child’s foreskin shall be circumcised.
The mother shall continue her purifying for thirty-three days; she shall not touch any hallowed thing, nor come into the sanctuary, until the days of her purifying are fulfilled.
But if she gives birth to a female child, she shall be unclean two weeks, as in her separation: and she shall continue in the blood of her purifying 66 days.
And when the days of her purifying are fulfilled, for a son or for a daughter, she shall bring a lamb of the first year for a burnt offering, and a young pigeon, or a turtledove, for a sin offering, to the door of the tabernacle of the congregation, to the priest. He shall offer it before the Lord, and make an atonement for her; and she shall be cleansed from the issue of her blood.
This is the law for her who has given birth.
If she is not able to bring a lamb, then she shall bring two turtle doves, or two young pigeons; the one for the burnt offering, and the other for a sin offering: and the priest shall make an atonement for her, and she shall be clean.
Mary brought two turtle doves for her offering after the days of her purification were fulfilled. (Luke 2:22-24). She was not able to bring a lamb. From this we know that Mary and Joseph were not wealthy.