@akhil17kr
When you are on headfi, you won't be able to survive with just one earphone.
I'm a guy with a small budget too, and I'm using all my allowance to buy one extra pair. That's what headfi does to you.
The built quality of ate is quite solid and should last but you need to be extra careful since the housings are big and wire a bit sticky which makes them more prone to accidental damage. Just use the pouch you got with es18 to store them, or buy a cheap hard case for $1~ from aliexpress.
Price doesn't matter with the KZs as B9 said. You can buy zs3 cheaper than zs1/zs2 and from what all say they are better. You can always cancel ate and buy atr. But won't that be a hassle.