Shipping is cheap - it's the cost of the cardboard that will kill you.

FWIW, the Boom does get you working on distance.

It's a relative thing (although Alex's idea is good, Gree points out its main flaw).

However, you do get very good at judging the touch needed to bump the first ball out - judging that weight is a good skill to have, regardless of whether or not you need to go up the slope.