Packaging it all in one box is more expensive than separating it.
I have done a few shipping estimates for some and here is the sizes and weights that I have been using.
Box 1 - 42x30x12 35lbs
Box 2 - 48x10x5 20lbs
Box 3 - 42x30x5 15lbs
Plug them into this site with your zip to get an idea of shipping
https://www.fedex.com/ratefinder/home