I have an order for an Absolut Vodka bottle cake that feeds 30ppl. I have been toying with the idea of making 6" rounds, filling, crumb coating, trimming one side that will lie flat and then tipping it on that side. Thoughts? Would this work or would it be easier just to carve? 

I see no reason why it wouldn't work, but it might be a little awkward to cut and serve.  But again, maybe not.  I think I would go with the safe option and use a sheet cake, split into two, right down the middle long ways, then torted and stacked. ready to carve.  I am a chicken and I think that would be a safer option.

oh yeah -- if it's gonna be laying down anyway -- ditch the six inchers --

yeah what sandra said