It's always been the sites agreed upon solution to go with good tires on front, and can go cheap on the back if you wish. This is also a common recommendation with any truck style vehicle on every site.
Steer blowouts cause bad wrecks, rears not usually.
I myself put on $300 mid-grade steers and they've been excellent. I still have 17 year old rear tires, have used my bus as a haul truck hauling all of my homes belongings back and forth across the city many many times, traveled 1500 miles to Florida, and they are still going strong.
If they are over 10 years they recommend replacing but, I see zero cracks in my rears, and has full tread still so I've chosen to continue using them and it's been no issue. I routinely inspect them because I do expect them to start cracking any day and when they do I'll replace them since they are 17 years old at that point.