If I write like King, that would be a good thing. Why? Because someone who likes a King book might pick up mine and like it also. I found Mercedes Lackey because someone knew I liked Marion Zimmer Bradley and recommended the Valdemar books. Lackey and Bradley both write fantasy novels, but they weren't competing for my money.
If I do my job right with my books, no one is going to look at them and go "oh, self-published/un-professional crap". Instead a reader will look at the book and think something like "hey, this book says it is X and I love reading books like X, so maybe this will be good" and then that reader will buy the book.
So far, this seems to be working for me just fine. Because I worry first and foremost about writing good books with my writer hat on, then putting on my publisher hat and making sure I have good covers, good descriptions, that my books get professional editing, etc.
Some other guy's crappy book that has a terrible cover, a painful description, and isn't well-written doesn't impact MY books at all. My books have nothing to do with that book. My name isn't on that book. That book won't be bought or recommended by people who might buy or recommend my books.
If I read a book I don't like, I don't immediately decide that I'm never going to read another book again. I go find something I do like and read that. A bad book doesn't ruin anything for me as a reader other than me having made a poor buying decision. But that doesn't happen that often, because I can sample everything, I can buy based on friend recommendations, I can buy based on reviews, etc. I can't remember the last time I read a book and was disappointed.
Anyway. Back on topic.
The guy said in the comments it took him about a year. Also, the 80 pieces up aren't all distinct things. Some are short story collections where he put up the stories and then collected them into books as well.