DigitalOcean is the best provider I've found for a cloud-hosted controller for Ubiquiti's Unifi wireless access points. Installation is pretty simple — basically, some swapfile, security, and firewall configuration, and then just adding the Ubiquiti repos and running an install.
It would be a great thing to have available as a one-click option for people setting up a managed access point solution.
The other option would be to let 3rd parties provide application images for situations like this — you could incentivize them with a version of the current referral incentive for everyone who uses their provided application image. Or a vendor like Ubiquiti might want to provide an application image of their own for a situation like this.