There are many ships that have 150-ton lifting capacity in the modern fleet, and where as years ago we traditionally called things over 150-ton as heavy lift cargo, that story is different today.
The QDR proposed that the minimum airlift capacity to support the two-war construct was approximately 50 million ton-miles per day with an additional surge sealift capacity of 10 million square feet.
As I noted in previous posts, there is the further question of whether there will be sufficient quantities of rare earth elements (REEs) available on the world markets to make the turbine magnets, which need about one ton of neodymium per 4 MW of rated capacity.