Actually a PID with a Solid State Relay is not that big a deal to put together. You can go simple with some of the wiring diagrams on this site. As everyone else will tell you, PJ has posted great wiring diagrams.
I thought about a PWM, but the advantage of a PID made the effort worth it. Not really that much more effort, though. It's not "automated", just controllable - which is what electric brewing is all about.