Biannual checks (twice a year) not required. Biennial check (every other year) runs me about $350.
. . . . . does one of the IFR pitot static tests take to perform typically?
I plan on around 3-4 hours if no major problems are encountered.
$400 here at KHAO - Cincinnati area. It takes about an hour for G3X touch, G5, GTX45R with no issues, a little longer it there are leaks or other problems, but the price will usually not change.
Guess I'm just getting really slow in my old age