I had thought about sething up as an AME to do class 2 medicals, but the admin and cost* obstacles really mean it wouldn't be worthwhile. I'do do it even if it only made a small income but I think it would cost me money instead. And I wouldn't need to do any extra training really.
Pity as I could do with a way to pay for more flying!
*insurance, premises etc. My phone autocorrected costs to "costrich".