Tires are always an interesting topic. I've spent a good portion of the past 25 years researching tires, cost, and happiness/cool factor, reputation, and did I mention cost? So, to the OP, here are my results using 50,000 miles as an average.
Cost: 1250 for a set of 5 BFG KOs. I kept them on, as I do all tires I purchase new for 50,000 miles. That works out to 2.5 cents per mile. However, I sold the previous set of four BFG tires ( 315s) for $500 that had 50,000 miles of wear on them, bringing the cost per mile down to 1.5 cents per mile.
Ten months ago after 60,000 miles I bought four new KOs and kept an older tire for a spare. Then I sold four of the KOs for another $500 and started the process all over again. This time however, the set of four cost $960 bringing the cost down to just over 1 cent per mile. Nonetheless, I've been using this monetary method to keep excellent tires beneath me for about 20 years. I do the same with my wife's daily driver. It seems to me that there are four major manufacturers to choose from that this equation will work. BFG, Goodyear, General and a bit late to the long miles game, Cooper. There are many more other brands on the market, however, discount prices generally means lower effective tread wear, weak sidewalls, and excellent performance only for the first 10,000 miles or so. At 40 or 50,000 miles they are junk that you are paying your tire guy to dispose of. On the other end of the spectrum are the really expensive designer tires that not many people care to afford. I'm sure I've dissed someones favorite tire, I certainly don't mean to do that, I'm just passing along my experience with the true cost of operating a given tire. Just over a penny a mile spent on the big tires we run is very cost effective. So, the next time some one remarks to you, " wow, those are expensive tires" just wink to yourself and let them think that.
I find myself doing this with a lot of things, including complete automobiles, computers, lawn mowers, furniture, appliances, etc etc. It drives my wife nuts. LOL