The titles pretty self explanatory. hoping to control three amps, two on at the same time at any given time. hoping to stay in a reasonable budget. Thanks!!!
I'm not sure what's a "reasonable budget" for that kind of thing.

Certainly there are gizmos that will handle it (better yet if the amps were already MIDI capable).
I'm not sure midi is what you are looking for. I use a lot of midi gear but if the amp itself is not midi controlable (designed and built with midi input) I don't think any external midi controller will be of any use.