Drone kits similar to Holybro x500/x650

Hello, I am trying to make a drone that will be able to autonomously track and follow a robot car that is moving on the floor. Last year I made a drone that is able to find and collect trash within a given area so I have some experience with this.
This time, I have to present a few options (at least 3) for which hardware to purchase which will then be voted on by a group of people. I already know I will include the HolyBro x650 development kit as one of the options but I cannot seem to find other similar kits.

My main requirements are that it should be an easy to assemble kit like the Holybro ones and should include nearly everything I need to fly the drone. It should also have similar payload capacity, size, and flight time as the Holybro x650 dev kit. I would prefer quadcopters, but if necessary I am fine with hexcopters as well.

So far the only quadcopter I have found that would fit my main requirements is the Foxtech Hover 1 but I was confused by this message on their page: **

Our company’s unmanned aerial vehicle (UAV) products only support domestic transactions within China. If your company intends to export UAV products from China, it is necessary to comply with Chinese regulations. Furthermore, the products cannot be used for military, terrorist, or war purposes.

And every time I tried to add the drone to my cart, the website would freeze. Is this drone available for purchase in the US?

What other kits are there that I can at least put on my presentation? (I strongly prefer the Holybro x650 but I have to present a few options regardless)