When Lehi left the ‘Old World’ his group consisted of less than twenty people. Yet, nineteen years later the people had so prospered in the land that they built a temple which
“…manner of the construction was like unto the temple of Solomon, and the workmanship thereof was exceedingly fine.”
However, Solomon’s Temple required 30,000 Israelites, 150,000 hewers of stone and carriers, 3,300 supervisors and about 7 years of construction.
~see 2 Nephi 5:16~