You do realize you should read the text right? All of your examples are saying something to the liking of this being from court costs. You do realize life in prison has a court cost as well, right? Except you also have to add the actual costs for the life in prison afterwards.. Deeeeeeeeerp.
There hasn't been an actual legitimate study on the court costs of life in prison vs death penalty. Quoting 1 article that studied court cases in ONE STATE out of 50 states with MANY different laws, regulations, and courts is FAR from a legitimate study. You can't study 1 liberal state and say all 50 are the same way. But lets say your bullshit one-sided argument is true. Ok. Fine. Death penalty COURT costs are < $1m more than court costs seeking life in prison.
Here you have a young male going to prison at a VERY ripe age. So how much does life in prison cost?
http://www.mountain-news.com/news/crime_log/article_4f1e45f8-5630-11e0-93da-001cc4c002e0.html
According to the article, it costs approximately $47,102 per year for prison. Again, we have someone young here, so saying he will last AT LEAST 30 years is pretty certain, but even 50 years seems very probably for someone in their 30's. Plus, they get free healthcare....
$47,102 x 30 years = $1,413,060
Not enough for you?
$47,102 x 50 years = $2,355,100
Need I go on? Death penalty is by far a cheaper option.