I'm an experienced web dev, and I've arrived at a very similar solution for a couple of projects recently. If hugo and a cron job CAN do the job, they're almost

I'm an experienced web dev, and I've arrived at a very similar solution for a couple of projects recently. If hugo and a cron job CAN do the job, they're almost certainly one of the best setups you can go with. So, opposite of insane. The absolute correct choice. The outrageous complexity of web tooling is a big hindrance if you can be served by a conceptually simple solution like yours.