Unironically could be a legit business model.
Not just for datacenters either - warehouses, refineries, power stations, you could sell to anybody with a building full of expensive stuff.
I don't think it issue is selling in the current climate, producing seems like the major roadblock. If Russia, the supposed number one in air defence can't even protect their military bases, ramping up production might be hard.
Oil tankers..
HN discover the defence industry…
In some countries maybe, but in west where all the valuable infrastructure is there is absolutely no way you could get a permit to shoot down anything.