Photoshop :: Reduce 30mb File Down To About 2mb?

My company used to put out a monthly "sales flier". It has been 6 or 7 months since that has actually happened. Previously, the fliers were done up in Publisher by the boss and to be quite honest the end result was very blah looking. I was asked to get this project going again and decided to ditch Publisher for Photoshop.

I created a 2 files (Page 1 and Page 2). Each file is 8-1/2" x 11" with a resolution of 300px. Each file contains 6 large images reduced in size via smart object along with text. As you can imagine this produced a file size of nearly 30mb each. This is too big for us to email out to our customer base which consists of about 100 customers.

What are my options to get these files down to 2mb or below but still keep the integrity of the work? I've tried reducing the resolution, saving as pdf with jpg compression down to low, converting to greyscale (this is something I don't really want to do as the look and feel of the flier is centered all around the colors).

I suppose I could also use some sort of zip/rar program to reduce a bit smaller.