Not so much a caveat, but a plan.
t would be a brave political party that put its foot down and declared that, come Hell or high water, it was going to pour funds into the establishment of these basic industries, and the training of personnel to create and operate them.
However, the Party needs to acknowledge that it expertise is in governing, not manufacturing. Therefore it needs to engage an expert in manufacturing to direct the project. This is how the USA won WWII. Not through military ability, but by throwing a tsunami of manufactured goods at the Front Line. Remember what Churchill said to the American People in 1941, "Give us the tools, and we will finish the job. That was before the USA entered the war, but the idea was put into practice for the aid of the British Empire, and ramped up when the USA came into military conflict with the Empire of Japan.
This video is about 45 minutes long, but it shows how one man with expert knowledge fulfilled Churchill's plea.