I think a special key (tool) is used to repair a tire while using them. Do tire shops in this country have the means to make a repair if needed. If not, you will using a spare tire/wheel that might not have the Tyron installed on it .
IMO, if you keep an eye on inflation ,feel the tires when you stop to see if they are getting too hot, set your hitch up correctly to evenly distribute the trailers weight and do not overload it . (take it to a scale all loaded)... you are going to be operating it as safely as possible. I would not feel the need for them .