Based on his current rate of cultivation, Jack Clark estimated that he could break through to the Sixth Mid-Stage in half a month and reach the late period within three months, even without resources like the Blue Crystal.
Later, when he'd have to kill some Evil God Sect Cultists or traitors, he'd see if he could loot 'money' from the corpses.
After that, he could exchange them for resources that would boost the growth of his True Strength, and perhaps he could reach the peak of the Sixth-level Heaven in two or three months.
By then, he would have probably created the Seventh Layer of the Secret Manual, allowing him to directly converge into the Seventh Stage True Martial Apparition.
As long as the resources kept up and the Secret Manual continued to improve, he would soon break through the Eighth Layer and step into the Nine Layers, with hopes of becoming a king-level cultivator within a year.
One-Year King, by that time, the entire Human Race would surely be shaken once again.