What does production have to do with geoengineering a whole planet? Yes, it will take thousands of years, at least, to create a habitable planet for humans and other earth life. Changing an entire planet is not something that happens quickly. The only reason we are able to have such an effect on our planet is because there's 8 billion of us and there are fossil fuels to burn and turn into chemicals. Other planets do not have either of those. Getting the necessary machinery to another planet might not even be possible. Geoengineering other planets is a far-off pipe dream idea at this point.

The whole enterprise is questionable. It would take multiple human lifetimes just to get there, and people and government are hesitant to invest large sums in super long term projects that have no return for the people funding it (taxpayers). Likewise, a business wouldn't take the risk because the cost is very high and the chance of success provides no value to earth or the company.