The problem with the B52 is that it's incredibly easy to shoot down, this makes it pretty useless as a strategic bomber unless you try going back to WWII tactics where you use massive wings and lose 1 in every 3 bombers.
The last time the B52 was used to fight an enemy that could possibly fight back was Vietnam and even while the Russians wouldn't give the North Vietnamese guided missiles they could still shoot down B52's.
The B52 sounds great on paper but it's more of a symbol than an effective weapon, its only practical use is on countries that have no air force or anti-air defences. In this sense, it's not very cost effective at all because you need to pay for all the F22/35 and ground forces to clear out defences before you can send the bombers in.
The requirement is for a strategic bomber that can penetrate protected territory. Here they need stealth and a bit of speed. An upscaled F35 with an internal bomb bay or maybe a long range drone carrier (I.E. a B777/A330 class aircraft that could launch short/medium range drones at extreme ranges, outside the range of enemy air defences. Drone recover can be optional, 4 or 5 could do the same damage as 10-20 bombers with minimal risk to air crews... Wait, strike that, too forward thinking for the Chair Force).