I am desperately trying to rationalize getting a new computer capable of a local hosting. What specs are we talking about for being able to do this in the way you describe in this article? The main use case is writing a novel. I'm not sure exactly what approach I would take (or the correct terminology for techniques) but one thing I would like to do is to have it trained or fine-tuned with expert resource information on literature (e.g., examples of literature and guidance on the art of writing).