You must remember that "cheap" tires going by the initial retail price are not always the cheapest tires in cost. Lower cost tires will have plastic rims that may not stay round through the complete wear of the foam especially during summer months. Their rims can break easily and the foam rubber can chunk easily. Lastly these so called cheap tires generally don't have a long wear wear time.
Of course I am partial to GQ tires because they are and have been the best quality tire on the market for the past 20 years. (Years not months..lol) Our plastic won't go out of round, you will have one hell of a time breaking them and most important our foam rubber will last longer than the cheap tires.
If you get 3 heats or more out of good tires and two heats (or less) out of cheap tires, were the cheap tires a good deal? If the tire chunks and you still have foam left on the tire, was the cheap tire a good deal? If you rim cracks on a glancing hit on the boards first time out on the tires, was the cheap tires a good deal?
There are a lot of tires to choose from in the RC Market. Just like everything else in this world, there is always cheaper! But cheaper may not be cheaper! Ask other racers at the track what they are using. Watch and see who is cracking rims or always needing another set of tires and not getting long wear. Find the better tire to use. The better tire may cost a few dollars more initially, however that tire will be cheaper in the end!!!!