There is no way you are going to fit all of this content on a 4.25x5.5 postcard.

It's also confusing that the project is titled as a "flyer", but must meet "US Postcard Design requirements".

Can you please clarify? Sounds like you want a full 8.5x11 double sided flyer, as postcard design prices.

Do you have a logo? Can you provide that in vector (AI, EPS, PDF) format? Do you have any photos or other media to include?

thanks