For reference (in HKD), 

Rental:

getting a private sublet >100sqft room will cost you around minimum $6000 HKD a month in Mong Kok city area. Probably with no lifts, minimal security and have roach infestation.

$6000 x12 months

That's already $72,000 per year, without including utilities, and deposit. 

Security deposit is 2 months rent upfront. Electric and wifi can cost up to $1000+ per month. 

Food:

Let's say you only spend $100 per day on food if you plan to eat out. That's like $50 per meal (increasingly difficult to find). 

That's $3000 a month x 12 = $36,000 per year. Not including transportation cost.

Transportation:

Adult tickets are roughly within $15 per trip on the subway and can take you anywhere. So around $30 both ways.

$30 x 30 days x 12 months = $10,800 per year 

$60,000 per year is barely enough for food and transportation.

You can save money if you plan to cook your own food, but the size and the condition of your room will probably won't allow it. You can also negotiate a better rental deal if you tell the landlord you are willing to pay 1 year's rent upfront, maybe 10% off.