Hello! I do remember the previous comment. It was really nice and I'm happy to hear you still love the game <3.
The DLCs will cost between $3USD-$5USD, depending on the type of DLC it is. The first three that are coming out in November will all be 4, so it'll be $12USD to get them in total. And we'll also probably have a little discount off the price at some point, too.