#1
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!!!
#3
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).
#5
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.