His company rakes in $6,000 in less than a day, from 4.15pm to 7.30pm, then 9pm to 11pm, every Sunday.
Mr Lim Yong Long, 55, owns Xing Sheng Transport Services, which provides bus services to foreign workers from their dormitories to Tekka Lane at Little India.
This may seem like a lucrative business, but Mr Lim tells The New Paper that there is a heavy price to pay: Coping with drunk passengers is a big headache.
His buses have been plying the route between dormitories and Little India for 15 years, so Mr Lim is no stranger to the aggression that comes with each drunk passenger at night.
The trips from their dormitories to Little India are peaceful and orderly, he said. But it is a completely different picture when they are being ferried back to their dorms.
Said Mr Lim in Mandarin: "It is very common to see intoxicated foreign workers board the bus to go back to their dormitories.
"The situation gets worse on the first Sunday of the month because that's when they get paid," he said.
Added Mr Lim: "Many of them tend to board the bus drunk. They become a little aggressive, especially when they are told not to board the bus."
Some hurl vulgarities at him for no reason. But Mr Lim said he just ignores them.
"These people work at a construction site. They are very fluent in their Hokkien San Zi Jing (three-syllable expletives).
"But we are in the service line after all. So to earn the money, we can only bear with it," he said.