I think that, too.
Their mother does not seems like the type to pay for their living expense.
oh i didn't think of that but i can see that happening the mom doesn't seem very reliable and he seemed to have a bad relationship with her (based on his expressions while talking to her)
yep! But it also seems that the mother favored the younger one and doesnt care about his other son.
Busted! But i think he's selling himself to be able to afford their school fees and living expense