Some tires last longer than others. Do a search on previous topics and look in the FAQ.
Reducing the rear toe in the alignment can help; again, look in the FAQ.
Front tires last 2-3 times longer than rear tires. Remember to use the same brand and model of tire on both the front and the rear.
Also realize that you spent a lot of money for a high-performance sports car, and you cannot expect the tires to last as long as on a family car or a luxury car.
The Kumho 712 is not worth buying. Even if you want a cheap long-lasting tire, there are better ones to buy.
Discuss your needs for tires and wheels with an expert like Alex at the Tire Rack, who is familiar with the NSX.
All of these things have been posted here on NSXprime many times before. Do a search...