Hi Rick,
great idea with the greenhouse! I'm also thinking of getting something similar for the balcony for the winter.
Back then, when I was living in Germany, I had also big palm tree in pot which didn't fit any more in my appartment and I also moved it to my office. In winter it was standing in front of my desk and it was like working in jungle. In summer the palm was on the balcony of the office. My boss had no problems at all. We then moved the palm (Trachycarpus) to Greece with the moving truck and planted it to the ground, but it wasn't watered properly, so it died soon after...
But coming back to the Veinte Cohol from Thailand. I checked their homepage and the good thing is, that the price includes a phytosanitary certificate, so customs shouldn't be problem. Did you ask for the price, because it's not yet listed on the homepage? Shipping is also not very expensive, but I'm a bit affraid of the long delievery. I wonder how much express shipping would be?
I also found a good document, which provides translation of cultivar names from the S/E-Asian languages to the international names:
http://kukr.lib.ku.ac.th/Fulltext_kukr/KU0222075c.pdf