The price of filial piety - $24m or $36m

There have been many guesses as to how much Hsien Yang paid Hsien Loong
for the property at 38 Oxley Road. All that was known was that he paid
at market price plus 50% or 150% of the market value of the property of
about 12,000 sq ft. Some have made an estimate of $2,000 per sq ft for
the land or approximately $24m. This is how the $24m number is being
tossed around.
 
Why did Hsien Yang