I have broken every single towing rule for over 35 years and have had 1 tire go away. That one was a puncture that I didn't catch soon enough.
Cheap China tires.
70, 75+ MPH.
Always in the summer and usually 90+ degrees.
My trailer only weighs about 7K loaded, but still......
So what is my key to success? I scan my mirrors about every 30 seconds to a minute. I know what's going on back there.
Most tire problems are caused by a loss of air and they will get hot and blow off of the rim. The very best way to prevent this is with a TPMS. The reason people always talk about tires going bad on trailers is because they don't have a clue that they are low on air or even on the rim when they are towing a trailer.
If I were you I would buy a TPMS, air them up to 10 over and roll on. And before anybody gets their panties in a bunch........read it one more time, "if I were you". IOW's I'm not telling him what to do, just what I would do. :)