Because Mr Bennett's estate is entailed upon the next male heir, in this case Mr Collins, a distant cousin. This means that when Mr Bennett dies, his wife and daughters will be left penniless unless the girls can marry wealthy men who can provide for them.
In the context of "Pride and Prejudice," it is important for the Bennet sisters to marry wealthy men because they come from a lower social class and lack personal wealth or inheritance. Marrying wealthy men would secure their financial stability and social status, ensuring their future security and happiness in a society where marriage is often viewed as a means of social advancement.
She knew her husband could not leave them his money as it was entailed to Mr. Collins. Society women relied on husbands or fathers to support them as there were few opportunities to earn. Also it was a matter of social pride.
Mrs. Bennet sees Mr. Bingley as a wealthy and eligible bachelor who could potentially marry one of her daughters and improve their social status. Renting Netherfield Park to Mr. Bingley would allow her daughters to socialize with him and increase their chances of a successful match.
It is important for the Bennet family because Mr. Wickham marrying Lydia would restore her reputation and prevent scandal. Additionally, it would secure Lydia's future by providing her with a respectable marriage and financial stability.
We are not told why Mrs. Bennet married. Mr. Bennet certainly did not marry for money, as his wife did not have much. He married her because she was good looking, high spirited, and appealingly silly. He clearly regretted this and lost affection for her.
Mrs. Bennet was concerned about marrying off her five daughters to wealthy suitors in Jane Austen's novel "Pride and Prejudice." She was particularly worried about finding advantageous matches for them in a society where social status and financial security were paramount.
Mrs. Bennet clearly believes it is very important to the well being of any young woman that she marry, if she can. This is because it is crucial to her financial welfare, unless she is independently rich, which the Bennet sisters are not. The issue of love seems irrelevant to Mrs. Bennet.
appearance
Mrs. Bennet's real worry is ensuring her daughters secure advantageous marriages to wealthy and socially desirable suitors. She is particularly concerned about the financial security and social status of her daughters in a society that places a high value on marriage and connections.
Mrs. Bennet is eager for one of her daughters to marry the new neighbor, Mr. Bingley, because he is a wealthy and eligible bachelor. In the Regency Era, securing a good marriage for daughters was crucial for their social status and financial security. Mrs. Bennet sees Mr. Bingley as a desirable match who could raise their family's standing in society.
she blamed Elizabeth
Caroline Bingley wants her brother to marry Mr. Darcy's sister, Georgiana.
The fact that the property is entailed means that at some point in the history of the family, a will was made out stipulating that the property could only go to a male heir and that this would be the case in perpetuity. There are two cases of entailment in Pride and Prejudice that are subjects of discussion. The entailment of Mr. Bennet's estate is the more important and is mentioned repeatedly since it is important to the plot and involves the heroine. The other is Lady Catherine's mention of the relative situation at Rosings. Her estate is not entailed to a male heir, and so it can pass to her daughter, who will be wealthy as a result. This contrasts with the Bennet girls' need to marry to maintain themselves.
No, he doesn't have to marry someone wealthy (even the Queen's sons have not all married wealthy women).