There are regular trade shows, conferences and events in USA nationwide. There are conferences and trade shows are available for every interest you can think of. Pick those trades shows which you think, your target market segment for your Custom Feather Flags would participate.
#1 economy - Custom Feather Flags
There are good chance you could make a fortune, just if you could find one or two volume buyer for your feather banners custom printed in their graphic. I noticed that there is an California boy exhibiting in all the car shows are living very well in selling his outdoor advertising signs.