Hi Paul,

Eric Schimelpfenig of SketchThis.net is a certified Kitchen designer and a SketchUp/LayOut trainer. If you're looking for one-on-one help specific to your industry, he's now offering training via Google Helpouts:
http://goo.gl/J3ac9c

Regards,
Chris C.
SketchUp Team

Maybe this faq is clearer:
http://help.sketchup.com/en/article/3000020

If I skip upgrading to 2013 and upgrade to 2014 instead, will I have to purchase a brand new, full price license?

No, worst case scenario would be upgrade cost of $95, plus nominal support reinstatement fee (TBD, but will be some percent less than $95). We will update this FAQ as soon as we know more about specific costs.

http://help.sketchup.com/en/article/3000023

What happens if I decide to skip a year in this program?

SketchUp Pro commercial licenses never expire, so skipping a year of the program doesn’t affect your use of SketchUp Pro at all. However, if you do decide to skip a year, you can expect a modest reinstatement fee should you choose to renew your upgrade, maintenance, and support program.