Because your brother is still studying and students don't have a stable income, the bank belongs to the ability to repay without compensation when identifying your repayment ability. So there is no way to apply for a house loan from the bank.
It is suggested that one parent and the borrower repay the loan together. The loan amount is determined according to the income of one parent, and the loan period can be determined according to the age of the student. It should be noted that both the principal lender and the borrower need good credit. If the borrower has bad credit, it may also affect the loan application.