The WordPress community is rivaled by none and that makes it a hard option to pass up on a budget.
edit: This isn't to say I prefer WordPress over something like Ghost. What I do prefer is something stable with a healthy community. I wish Ghost as well as others like it the best of luck in getting there.
A community has to start somewhere. Ghost is a brand new platform but I'd be surprised if a strong, active community didn't grow relatively quickly. It's gained 800 stars on GitHub in the space of about 3 hours.
The WordPress community is rivaled by none and that makes it a hard option to pass up on a budget.
edit: This isn't to say I prefer WordPress over something like Ghost. What I do prefer is something stable with a healthy community. I wish Ghost as well as others like it the best of luck in getting there.