My company owns one, the same make as the one that shot the dragon battle scene in game of thrones. It's a single rotor, and you're right on with the specs. It's not super expensive though, about as expensive as a high end luxury car. Definitely out of range of most consumers, but not crazy for a small business to have. You also need a small team to operate it, and because of its weight there's more aviation regulation applicable, at least here in Europe.

I'm sure the premium charged by broadcasting drone sellers has more to do with stabilizing drones even during manoeuvering than it has to do with maximizing payload and range. Drones used in broadcasting can do pit stops pretty much at will.