What are Charlie and Lyddie's plans in the book Lyddie by Katherine Paterson?

When their
mother abandons them to go await the end of the world with her sister,and Charles stay behind
and try to keep the farm running by themselves. They plan to keep the farm going until their
father returns. They tell themselves that "in another year, after another harvest, they
would be experienced old farmers and sugarers." But then they receive a letter from their
mother telling them that they have been hired out to repay the family debts, and they must leave
the farm. They both view this as a temporary setback. Lyddie determines to sell the calf and
keep the money so that when their father returns, they can all be together again and they will
"have a little seed cash to start over with." They don't actually know whether their
father is alive or dead, but if he should ever send for them, "we'll persuade him to
stay," Lyddie says. Her persistent dream is to return to the cabin and the farm again to
live with her family. Therefore, she and Charlie take care to bar the door against intruders.
Once working at the Inn and later at the Concord Corporation, Millie meticulously saves her
money so that she can pay off the debts of the farm and return to it with Charlie and then send
for the others. Her unwavering goal is to live together again with all her family on their
family farm.