DigitalOcean's payment model is great for this. What you see is what you get without small charges or other fees. I vaguely remember Lightsail's release being met with poor feedback on HN because they really missed part of what makes DO by complicating the payment model.
Currently DO does not charge for network overages. I guess they would suspend your node for going way over the prescribed limits.
I'm not affiliated with DO, but I just really like the service.
https://www.digitalocean.com/community/questions/extra-bandw...
I've got a few things running on $3/mo Scaleway boxes. Bandwidth is unmetered and 200Mbit/sec. The only extra cost I pay for is additional storage volumes (50gb included, additional 1 euro per 50 GB/month) - other than that, dead reliable and all inclusive.
I guess I'm interested in what other costs beyond the monthly keep-it-alive fee can come up with this tier of hosting