You’ll pay at least 10x more for a high-end system like Stype RedSpy. It’s super accurate, has very accurate calibration and once it’s set up it should be very reliable. With a ReTracker Bliss you’ll get very good results for a fraction of the price, but it’s harder to set up. So, it’s time vs. money as usual. 

I am talking about a satellite channel, so I do not think they will accept such a ReTracker Bliss.

Why not? It was just recently used in the Miss Lebanon gala, broadcast over the whole Middle East.