How much would you pay.....

You are almost always better off renting the track if you really want to test. There is usually a 12-15 max car count, and you can make as many passes as you want, whenever you want. T&T days can be a huge waste of time.
Agree...... and disagree. It kinda depends where you are,what your circumstances are, and how and when the tnt is. Irwindale opened the gates at 4pm on a thursday, raced from 5pm to 10. Until i retired, i could take my car to work, bug out at quittin time, and be at the gate before it opened. Now that i'm retired, it's even easier.
If you were in the lanes at five , you could get in ten laps before the crowd got there. On a busy summer night, if you didnt get there by 7:30, you got one or two. I have seen racers pull into tech at 9pm, wondering what they're thinking!
If your local track runs their tnt on the weekend, getting the passes you paid for can be a challenge.