Mike, I like the way you think on a number of levels.

I looked into your suggestion already - most yards do not allow "stacking." Big debate at our club right now because Pete Melvin has three boats in his mooring space. Some on the Board want the revenue from the other two boats. Others think if the space is paid for, you can do as you wish. Space is really a premium out here, and tax dollars are, too.
And back on topic - the reason we got off on Waves was because the model was suggested for Getaways. I agree with that approach completely. We already know it works...