I've tried colorizing photos with this code (result here : https://twitter.com/matsiyatzy/status/706270684209680384) using EC2 instances. It's pretty fast, around 10-15 minutes, though you'll definitely want GPU-instances with CuDNN drivers installed (which can be a bit tedious to set up).
Is it possible to just spin up an Amazon EC2 instance and make it work?
If so, how long would it take, and how much would it cost, to produce one hybrid image? (Let's say something small, like 640x480 pixels.)
We're not talking hours of processing time per image, right?