一点意见It is possible to afford this condo if his salary is $3999.
He can pay his installment using cash+CPF(~$800+), thus he pays cash $1300 every month. But in condo, some extra cost exists, such as maintenance fee varying from $200 plus to $400 per month. Anyway, quite tight life with such a salary. Very daring.
估计他把房间租出去了, 这样就没有问题