Camera and lenses aren’t the only photographic essentials that cost money. A decent machine with plenty of RAM and fast storage (preferably SSD) and rather expensive serious photography software are must-haves, too.
That’s at least how the conventional photographic wisdom goes. It may be so if you are making a living with your photography. But you don’t have to throw your hard-earned money into the bottomless pit of photography, if you are willing to look away from “industry standards” and “de facto” tools.