loop-the-loop,
You may find that you need considerable tailwheel experience and a good number of flying hours before anyone lets you near their Tiger Moths/Dragon Rapides/Harvards. If you have that, great. If not, you need to get it.
email the operators of these outfits and get the facts.
I understand that the market for these Days to Amaze-type flights has diminished, somewhat. I speak as someone who has "done a bit" in the past, when I tell you that you will, as ever, work bloody hard for little financial reward.
Don't wish to dispirit you, just inject a note of pragmatism.
bogbeagle