Is your project about writing or just building the weblog software/system? If you'd like to write, your audience doesn't care what underlying technology you're using, so you go with whatever is the cheapest, easiest, or with least maintenance.

I'm personally using Github Pages (with Jekyll). I've never paid anything, and except for some version upgrade a while back, haven't had to do any maintenance. As for the upfront cost, it took me a bit to get a Jekyll theme to work out for me, and I'm not particularly fluent with Ruby. Good luck.