Clarification alert: I don't recall the price-tag, but he _did_ have a security system installed, quite a pricey one at the time. It included high, barb-wire topped fences, a video system at the gate, powered gates...
This was all before any of that was considered in any way "standard" and it cost nearly his yearly pay.
I know that it was the fact because I remember watching the committee hearings and thought his comeback on it was priceless. The "net rumor" is that he said he was protecting his family against Osama Bin Laden. But he actually said "Abu Nidal." I watched it live on C-SPAN.