Jet technology is much more complex to meet environmental, safety and efficiency goals. Fuel was much cheaper in the 1960's, I wonder what the cost of a jet is

Jet technology is much more complex to meet environmental, safety and efficiency goals. Fuel was much cheaper in the 1960's, I wonder what the cost of a jet is in terms of it's operating life? Rail and other ground works have got much more expensive as labour costs (in the developed world) have risen. I expect that rail costs in China are not 10x? I would be interested to know ! In term of moonshots I think that safety and risk would mean that a modern mission would be much more expensive than Apollo.