Adorama has been around in the camera world for quite a while so using them is completely fine. Them and B&H are very similar. I bought my FX-30 from Adorama, no issues whatsoever, only took a couple days from ordering to at my door.
A little clarification is needed here.
First, there is no such thing as "commercial" drone rules in the United States. 14 CFR §107 is the default set of drone regulations in the U.S. Which means if you fly a drone in the U.S., you must fly under...