It was easy to buy a computer. Furthermore, Kimura Kazuki did not buy a used computer when he was at Akihabara. Instead, he bought a brand new laptop with amazing performance.
He disregarded Furuhashi Sakurakyu's request to take a stroll around Akihabara and also ignored her request for him to buy a desktop with top performance.
2080TI, 9900K… he did not understand any of those. Whenever she saw a new product, she would ask for it. She had never considered that he was living in such a cramped room. How would he have any extra money to buy unnecessary worldly possessions?
Furthermore, if he did buy a desktop computer, he would also need an internet cable to connect the computer to the internet. It would take a few more days to complete the process. A laptop would be less troublesome, and Wi-Fi would suffice.