A solid XLR microphone and USB audio interface setup will easily last you a decade. You are buying this to record clean vocals, instruments, or podcasts without the hiss and clipping of cheap hardware. Getting the right core setup today means you only buy once instead of replacing compromised gear in a year.
Audio hardware does not age like smartphones. Brands update audio interfaces every few years with minor cosmetic tweaks, meaning previous-generation units deliver the exact same sound quality. Targeting those older models during major sales gives you high-end performance at an entry-level price.
Keep in mind that a promotional rate is a hard timeline, not free spending. If you still have an unpaid balance when the 15-month intro window closes, standard variable interest rates will immediately apply to whatever amount is left.