We are sitting in the cramped three-room house he shares with his brother's family in the Pashtun-dominated neighbourhood of Sohrab Goth, on the outskirts of Karachi.
Mr Khan and his brother rented it after they fled their native South Waziristan. So far, it is thought nearly 15,000 people have fled to Karachi to escape fighting in South Waziristan.
Most settle on the outskirts and many find work as labourers, watchmen or in Karachi's Pashtun-dominated transport industry.
"For the time being, most of the families fleeing the conflict in the tribal regions cannot return home," says Ismail Mehsud, a young Pashtun politician in Pakistan's financial capital. "It's a vicious cycle - and the state appears unwilling to play its part," he says. "Just handing out blankets is not going to help. Increasingly, Pashtuns are being made to feel like second-class citizens."
Wilayat Khan agrees: "I thought all of Pakistan was our home. But more and more, I feel like a stranger in my own homeland."
Edited from this BBC report.