As Eshaq's project grew, he slowly converted the caravansarai into a fort while simultaneously fomenting quarrels and divisions within the tribe through various intrigues.

As the chief of the tribe, he managed to transform Torbat-e Heydarieh into a prosperous and safe district, while also making a fortune through farming, leasing camels to merchants, and developing an export/import trade.

Fath Ali Shah's appointment in 1803 of his young son, Mohammad Vali Mirza, as governor of Khorasan was probably perceived by Eshaq Khan as a move designed to exact his allegiance and thus did not please the ambitious chief).

He initiated a conspiracy with the chiefs of Khabushan, Radkan, Chenaran, Darra Gaz, Jahan-Arghiyan, and Bojnord[4] to unseat the governor and assume the reins himself.

Fath Ali accordingly issued a farman (royal order) declaring Eshaq as the Hakim of Mashhad, thus relegating the shahzadeh to the position of ornament.

Finally on 8 July 1816 he and his eldest son, Hasan Ali Khan, were strangled by the order and in the presence of Mohammad Vali Mirza Qajar.