In the Raleigh, NC area mid-to-3/4 high-end custom homes in the 4,000 sq ft area w/ 3-car garage run around $175 to $200 per sq ft including the lot with lots running typically from $100,000 to $150,000. That means the build portion of the cost is typically in the $140 to $175 per square foot range.
Another popular theory is that the Joker is Jason Todd a.k.a. (another) Red Hood a.k.a. (briefly) Nightwing. Jason was brutally beaten to death by the Joker in 1988's 'Death In The Family' storyline. In all honesty, this would be a little difficult to explain: Jason Todd beaten to death by the Joker who happened to be Jason Todd all along.
The Joker was an insane, homicidal supervillain, and the arch nemesis of Batman. His white skin, green hair and blood red lips belied the chaotic nature that underlay his cartoonish appearance.