New guy old subject..tires

I went through the same thing last summer. What I did was go to a place that sells tires for contractors equipment. The tires they use to hall bull dozers etc, seemed like a good choice since I hate flat tires or blowouts. The tires that they put on the equipment trailers are rated 14 ply. Price was only about $20 more per tire. I not longer have to worry about tire problems.
The equipment that these tires carry around weigh much more than my trailer.