Even though it's apples and oranges in more than a few ways, Dave Winer is right when he says it's easier to host WordPress than Mastodon.
Dave's a little more all in on WP than I am. Maybe a lot more all in. Still, it's true that anybody can host their own WP instance on shared hosting, a VPS, bare metal — what have you. I've done it more than once, and I've never successfully built a Mastodon instance, though I have tried a few times.
I did get GoToSocial running and used it as a 1-person Fediverse instance for a couple of years. I have it turned off because I was using 80 GB of disk space, and I had trouble properly backing it up. If GtS had the Mastodon feature that allows users to only keep posts from the last week/month(s)/year, that might help. I was following about 2K accounts, so that might why the data ballooned to 80 GB.
WordPress is easier. It's straight up LAMP stack. Very 2000s. But a blog — and even a multi-site blog — is not the same as a Fediverse server. And WP, Mastodon and GtS all include a database. I used PostgreSQL for my GtS instance because I wanted to learn more about "real" databases, but in retrospect I should have used SQLite, which is easier to back up (and move) — no dumps, just a big ol' file.
The whole deal with static site generators like Hugo and Zola (the two I've used the most) is that they produce lightning-fast sites that don't require PHP or a database. They're (very much) wonkier to use, and comments are difficult (so much that almost nobody has them), but you don't have to maintain (and worry about) a huge PHP app with MySQL database on a server somewhere, just waiting to be hacked.
Of course a Fediverse instance — and the Fediverse in general — is all comments, all interactivity (though you can create an account and treat it like a blog, just like you can sort of treat a WP site like a Fediverse account — so they both play in each other's pool).
I thought about starting a blog as a Fediverse account, either on my own instance or another, but I needed one with a huge character count (like GtS, not like most Mastodon servers), and I probably need to NOT follow 2K accounts and see how it uses disk space.