I'm sure if he wasn't also a caretaker, losing control of his ability to schedule around being a caretaker wouldn't be "rock bottom".
His life would be much "easier" if he didn't have to be his mother's caretaker. But this is America, so he has to, so he's fucked.
for sure it would be much easier if it was just me to consider in the picture
I live near Boston, but far enough away that commuting daily is impractical. Instead, I go in once a week.
Perhaps you can focus on applying to jobs where you can show up in person occasionally, but not daily? It helps significantly to have a face-to-face relationship with the people I work with.