I think the modern equivalent is around $85 million each.
7000
The standard runway length for planning purposes is about 10,000 ft
B52 Stratofortress heavy bombers commenced operations in theater in 1965.
A fully loaded B-52 bomber can cost approximately $70 million to $100 million, depending on various factors such as the specific mission configuration, payload, and additional enhancements. This estimate includes the aircraft's base cost and the cost of munitions and other equipment needed for a mission. However, operational costs and maintenance can significantly increase the overall expenditure over time.
I worked on the B52 in the seventies at Loring Air Force Base, and it was common to put 220 thousand pounds of fuel on a B52, which is about 36,000 gallons, along with a full load of bombs.
I put 48,000 plus gallons on a B-52 at Mather AFB Ca. in 1969
b52.
b52
B1 Bomber
68
B52 Nixon, Commander in Chief; used the B52 against North Vietnam more than any other US president.
Approximately 2,000 jets were lost in the war, discounting the destroyed B52's, each jet averaged about 1 million dollars apiece.