Building a homemade diffraction grating can be challenging, with many suggesting that using a CD or DVD is a practical and effective solution. While creating one from scratch is possible, it is often deemed too difficult for most individuals. The discussion highlights the balance between the desire for a DIY project and the convenience of purchasing a ready-made grating. Ultimately, using a CD or DVD is recommended as a simple alternative. Homemade diffraction gratings may not be worth the effort compared to readily available options.