I went to NAMM the last 2 years. There are many smaller production, high quality, guitar manufacturers that show their instruments a few different ways.
To cut the booth costs, they partner with amp companies, they co-exhibit with other similar manufacturers, or they have a distributor/marketing company show their products in their booth or other related events. The Genzler booth, for example, was shared with Aqualina basses from France. My friend Allistair Hays, maker of Emerald Guitars (carbon fiber instruments from Ireland) brought a few guitars for US delivery, and was in several other vendors' booths like Wild Custom Guitars.
With Alembic, there is so much customer loyalty, and fantastic US-made, custom instruments, and affluent customers, that you could probably completely defer the expense of having an official booth.
You might just run a contest where you reward a few of your customers or dealers for bringing their instruments to the event, handing our your marketing collateral, and connecting them to the closest dealer, or to the mothership in Santa Rosa.
I would gladly do that next year...