depends on where he is. cost of prisons varies wildly by state and city, which i find to be a bit bizarre. According to some quick research, it can be as low as 13k a year (Louisiana) to as high as 47k a year (California) and even on smaller levels 167k (New York City).

30 years in Louisiana is just over 2 years in new york city.

True, but bear in mind that elder/end of life medical care tends to be especially expensive, so I think the total is realistic.

I don't find it so odd that cost varies - consider land price, cost of living (for prison staff), heating (much more expensive in northerly latitudes), and so on.

I don't find it odd that it varies, just that it varies so wildly. well over 10x seems unreasonable. If it is an area that is that expensive, perhaps it makes sense to transport the prisoners a bit to a less expensive area.

There are often legal barriers to transferring prisoners out of a state, not least that it imposes a significant burden on their families who may be unable to visit them (and who have rights of their own, regardless of how one feels about the prisoner).

I should have mentioned that states like NY als have more extensive rehabilitation programs (which cost money); on the upside, as far as I recall NY has one of the lower rates of incarceration and recidivism (but I might be wrong, don't feel like delving into the stats right now).