1 big goal or many small?

I believe that it is possible to accomplish anything you set your mind to. However, I think it comes at a cost. We only have so many hours in a day, only so much brain juice, only one body with only 2 arms. “You can do anything, but you can’t do everything” that is what I have been living by for years. I believe it, but I don’t really like it.
I think that I could be an amazing businesswoman, or I could be an amazing mom, but I can’t do both because one will always suffer. This can’t be right. Look at you. Look at Jody Moore. Maybe I could do both.
So as far as an impossible goal goes: Being an amazing mother (meaning I spend quality time with my kids, have patience most of the time, teach them to live happily and responsibly) is possible. Making X amount of money in my business this year is possible. Doing both at the same time, impossible. So what should my impossible goal be if I’m only supposed to have one, but I believe only 1 goal is always possible?