Why the color tv sets where so expensive at the beging?

[Telecolor 3007]

Why in the early days the color tv sets where so expensive? It was becuase manufacturing cost where high (no printed boards, a lot of time to assamble the components, delta color picture tube where more expensive and harder to adjust) and that 1964 selling boom of color tv sets camed because by that time printed circuit borads and semiconductors camed into tv set, making them more easy to be manufactured?