But it takes time an money to do this. Also, look at it this way. An industrial Complex costs 15 IPCs. A Transport costs 8 IPCs. Thats 3 tanks or 3 infantry for the IC (Assuming you put it in a 3 IPC zone). At the same time, the Transports could put 4 Infantry or 2 tanks onto the mainland. Now, add in another Industrial Complex (15 ICs) and 2 more Transports (16 IPCs) Now you have 6 tanks per turn, or 6 infantry. You have 8 infantry or 4 tanks per turn with the Transports. Now add in 1 more Industrial Complex and 2 more Transports. Now 9 Tanks per turn (If you have the money) vs 12 Infantry or 6 Tanks.
thats a pretty solid ratio for both right? Now lets talk about the Stratigic Advantages of Transports and Industrial complexes.
Transports are mobile. They can move from Japan to Indochina, or to Alaska or to Hawaii , 2 turns brings it to Panama or to India. 3 turns to The Med (if germany controls both Syria and Egypt). A Transport is more effiecient at transporting Infantry (4 inf compared to 3 for IC) but less effiecient at bringing tanks (2 for the cost of 3 for Industrial Complexes) The downside is they can be attacked and easily blown up.
Industrial Complexes are better at tanks then Inf (as mentioned before). They provide a solid way of delivering things to the mainland. They cannot be destroyed. But, if they are captured, they can be used against you. The max number of united (with Japan’s three mainland provinces) is 9. this makes them good for pure offense, but bad for long term play. also, remember, in the begining of the game, the India/Sinkang factories are at the same level as you.
Now, I ask you a question. If USA is picking off your transports, like you mentioned, how are you going to get 45 to spend every turn in industrial complexes instead? USA will be involved in Island hoping your islands, if like you said he is paying attention to you. You’ll never get the 45$ a turn. And, you’ll be forced to spend part of your money on navy . How would you handle this?