It's not unusual for families to argue about money.
YOU CAN USE TOO BEFORE AND ADJECTIVE + INFINITIVE, ESPECIALLY...
hard, difficult, and easy
It's not easy for a lot of people to raise children.
It's never too late to learn new things.
YOU CAN ADD FOR + PERSON AFTER THE ADJECTIVE, ESPECIALLY AFTER...
It's important to many people / for many people to live near their families.
PEOPLE FREQUENTLY USE not WITH THESE ADJECTIVES BEGINNING WITH un-, in-, im-, ESPECIALLY IN ACADEMIC WRITING. THE ADJECTIVE CAN BE FOLLOWED DIRECTLY BY AN INFINITIVE OR BY FOR + PERSON.
It's interesting to me/ for me to watch parents with their children.
late, young, early, busy, small, old, long, good, tired, easy, hard, and difficult
It's difficult/hard for me to make decisions.
It's not uncommon to feel sad when your children leave home to go to college.
I was too young to remember my grandmother.
YOU CAN USE TO or FOR + PERSON WITH...
impossible, and unusual
interesting, fascinating, and important