I am a Firefighter / Paramedic and will be retiring in about a year. I got most of my ratings at the local FBO, except my initial ME, I went to a ME specific company for that.
I plugged along as a free-lance instructor for the local FBO, began to teach ground school at the local JuCo. And basicly made it well known that I was an aviation slut, would work cheap, or maybe free. This lead to me flying 135 ops for the FBO, and for an air ambulance for a spell.
I am trying to decide which route to take after retirement. You are correct when stating that the amount of info is priceless and amazing.
Good luck