I love the spirit of this! Like other have said, moving away from Heroku to a dedicated server that's already hosted would also be a win. Even on-demand AWS EC2

I love the spirit of this! Like other have said, moving away from Heroku to a dedicated server that's already hosted would also be a win. Even on-demand AWS EC2 instances may be cheaper than your dynos. I'd personally still lean towards a service where I could get a VM or dedicated box so I could keep internet access and power off my mind. That said, installing at a colo could be a good middleground for "bring your own" hardware, but power and internet included. It's hard to say without knowing the nature of your SaaS because that can dictate risk tolerance and SLAs, but I'd run the costs on what the upside is vs the potential of an issue and what the cost of those issues are.