> Wright borrowed $5,000 from one of his bosses, Louis Sullivan,[25][28][29][I] who took title to the land.[19][23] In exchange, Wright had to repay the loan within five years.[30] Excluding the land cost, Wright eventually spent $5,300, which included $1,200 from his own savings and $3,500 from Sullivan's loan.

https://en.wikipedia.org/wiki/Frank_Lloyd_Wright_Home_and_St...

That was for the original construction, which was much smaller in size. The house you see in the photos was after multiple expansions and additions as his career took off.

According to BLS CPI data $5000 in 1889 is $182,132.07 in modern day purchasing power