Transmigrate to the Fifties: The Big-Time Breeder

A certain animal keeper from a high-tech world accidentally transmigrates into a novel set in a bygone era. After arriving, she discovers that food and clothing are scarce, and living conditions are extremely harsh. But no worries! She has plenty of skills, plenty of talent, and an optimistic personality. What? It's too poor here? That's no problem. I've got two hands and two feet, so I'll just earn a little more. What? There's not enough to eat? That's even more ridiculous. What do you think I earn money for? I'm going to buy grain and feed myself till I'm full, not save it for the next generation!

Father-in-law: "Eldest daughter-in-law, your mother is sick and needs to be hospitalized. You two can cover the expenses, right?"

Mother-in-law: "Eldest daughter-in-law, my chest hurts. Buy me some good things to nourish me, will you?"

Second brother-in-law: "Sister-in-law, my nephew's wedding needs a little more for the bride price. Could you chip in?"

Younger brother-in-law: "Sister-in-law, I'm a little short on money to buy a house. Could you help make up the difference?"

Younger sister-in-law: "Sister-in-law, I still don't have a dowry for when I get married. Could you give me some money?"

The eldest sister-in-law stares wide-eyed at the several claws reaching toward her, grabs her butcher's knife, and roars, "Get out, all of you! Go cool off somewhere else. If you dare hold out your hands in front of me again, I'll chop them all off!"

This story is set in a fictional world! It is a slow-burn story! The male lead doesn't appear until partway through!