There is NO ball and burlap nursery stock here. Moving containerized material is easy enough.
Imported propagation material is brought in by air (not boat) as bare root cuttings or in rock wool, then grown on, moved from container to container.
A lot of material is propagated locally and very well.
A 1 gallon potted plant can cost from $7.00 to $12.00 depending where you buy it. Next sizes are 3, 5, 10, 15 and 20 gallon containers. A nice palm in a 5gal pot will cost you about $60-$100.
Our biggest nursery uses a soilless potting medium, it all bark and coconut husks and pearlite and stuff, they bring it in by the container from the US. I don't particularly care for it as the plants are soft and the transition to native soil can take a while in some cases.
There was one tree farm, where large stock was grown in the ground then dug up and moved to the site, it did quite well, then the guy in charge moved on, I think its defunct now.
Other than that if you see a tree or palm you like you knock on the door and see if the owner wants to sell it! I bought coconut palms for $100 per foot of clear trunk, so paid $1000 for a 10' palm for one landscape installation. Some people have palms in their gardens that they are willing to sell, but only when they need to, one person called hers, their 'emergency medical fund'!
People grow coconuts in pots for extra cash, $200 for a 3' high seedling is common.
Large mature palm are worth a fortune as all palms MUST be propagated locally. There is a permenant embargo on palms due to risk of disease.