I would be willing to try a few @ 7 bucks. I think I can do about 2 in an hour, but it has been a while since I did a goose. The only geese I ever processed was domestically raised. I have processed wild ducks. I don't have too much of a problem with plucking, but the pin feathers are a chore to deal with. I must have done something wrong everytime I tried waxing, because it never worked out quite right. 30 @ a time might be drudgery. Thats why I would want to try a small amount first.
I only like dry plucking because of offensive smells and messes. In this case I would also consider the down as part of my payment. If you could come to a place where you think you have something good going with your deal, you can stuff a whole lot of pillows and comforters with your little fringe benefit.
Now if you can get 10 a piece, more power to you. I know a few hunters that wouldn't have a problem with that. Then I know a bunch that wouldn't consider it worth while and would refuse and just do it themselves.