I'm sure I rang alarm bills last week.
I borrowed cash to buy a truck from a private party. They wanted payed back in $100 bills. I had to go to 3 different branches in one day in order to withdraw 75 $100 bills to pay my debt.
My legs remain unbroken.
Yes, anything over 10K is reported to the Feds. A few years back I bought a small tractor with front end loader, back hoe and a 52-inch tiller. I paid cash, took money out under the 10K amount. I made a deal with the seller; I came in 4 days in a row with 5k and had it delivered on the 5th day. Nothing illegal about doing it this way, I even made the deal like it when I bought my new vehicle last April.
Where there is a will there is a way.