Ghost runs on NodeJS which isn’t available at most cheap webhosters. Also it doesn’t do traditional blog things like pingbacks, trackbacks or webmentions.
BearBlog can’t be self-hosted at all - it says so right on their GitHub’s README.
WriteFreely is a Go binary that - again - isn’t supported on most cheap hosters. Also I can’t seem to find anything about it supporting pingbacks, trackbacks or webmentions. It seems to be more like a one-user Mastodon instance.