How does the trunk look on this 15 gallon dwarf coconut, worth getting it or is the trunk not thick enough? It's a fiji dwarf.

I finally purchased the Beccariophoenix Alfredii here in Orlando Fl. I can’t wait to see how this beautiful palm responds in zone 9b. 

In regard to the fiji dwarf being disease resistant to lethal yellowing is it resistant just to that or diseases in general?

https://www.nwestiowa.com/news/sibley-man-cuts-down-unlikely-palm-tree/article_6fc173c0-ecb8-11e9-81e5-efee02cc76e9.html
 
this man in Sibley Iowa (Zone 4) grew a Washingtonia to 20 feet tall by building a greenhouse over it in the winter time. Unfortunately he cut it down but still has a smaller second one