I put up all these pages, but one by one. The most I put up in a day was five and some times I went a long while between making new pages.
It is so easy to make these pages I cannot see how it would be any easier to import already done pages. It only takes me about 15 - 30 minutes to make up and publish a page. It's getting the coloring images done that takes the time, but not making up the hub page in and of itself.
There are some tricks to getting the format correct, and to maximizing the best placement "above the fold". If I can help you let me know.