Ive bought trade wind trees and they are ok, they are lanky twigs but of course they will grow fine once they get going.
You can get much nicer trees at clausons in san diego for 18$ each. I dont know if they will have 100 trees to sell, maybe hass trees. You can call them, but those are 5 gal trees in grow bags in DG. Much bigger rootstock and tree than the mail order trees. They are heavy like a brick though.
Theres also Atkins nursery in san diego county that quoted me 3$ each for zutano rootstocks in small grow bags also. You could call them as well but neither of those places are going to send you trees. You could drive them back I guess but it might not be worth it.
I will have a lot of bacon seeds if you are interested. They will be ready in december and make great rootstocks. The trees are super vigorous.
Whatever you decide, good luck with it and keep us updated.