I would imagine they would cost more. There are a great many appeals that are automatically heard in a death penalty case. More time in court means a higher cost.A 2003 legislative audit in Kansas found that the estimated cost of a death penalty case was 70% more than the cost of a comparable non-death penalty case. Death penalty case costs were counted through to execution (median cost $1.26 million). Non-death penalty case costs were counted through to the end of incarceration (median cost $740,000).
Under the current system? No. There has been to much 'politicking' of the death penalty issue. To many proponents and opponents getting in the way fo the system. On paper, it's a pretty easy process. You get your case, if your found guilty you get an automatic appeal (sometimes more then one). It can take decades for a case to make it through the court system. If cases could be processed faster and the punishment administered in a more timley manner, we might see more 'desired' results then we do now.Does capital punishment really work?
Anyway, here's an interesting article on lethal injection from "How Stuff Works". It takes a good look at the whole process. Definatly worth reading.
Howstuffworks "How Lethal Injection Works"