A young Nepali farmer who was rescued 80 hours after the earthquake hit says he wishes he had died in the accident.

Rishi Khanal, 26, was due to travel to Dubai on Monday where he had been promised a $280-a-month job as a cleaner at a KFC restaurant, according to an ABC report.

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Mr Khanal took the job in hope of pulling his young family out of poverty, and had arrived in Kathmandu on Wednesday after leaving his wife and six-month-old son in their village in the western hills of Nepal.

The farmer was buried under the debris of a five-storey guesthouse when the 7.8-magnitude quake struck on Saturday, and was forced to drink his own urine to survive.

On Thursday as he recuperated in hospital after having his leg amputated, Mr Khanal said he no longer had any way to support his family.

Rishi Khanal in hospital. Photo: Getty

“What will I do for the rest of my life?” he said.

“My chance to work in Dubai is gone and I cannot even work as a farmer.

“I don’t even have the money to buy a wheelchair now. How will I spend the rest of life and support my family?”

More than 6,000 people have been killed in the disaster, while another 11,000 have been injured.

Hundreds of thousands have been displaced and are living in tents as international aid efforts are hampered by landslides and aftershocks.

Nepal Prime Minister Sushil Koirala said it was a “very difficult hour for Nepal”.

“The government is doing all it can for rescue and relief on a war footing,” Mr Koirala said in an interview with Reuters.

Australia has committed $5 million in emergency aid, while the United Nations has released $15 from its emergency relief fund.

Nepal’s army chief General Gaurav Rana on Thursday warned the death toll could reach 15,000.