If all you need is office and a web browser there's plenty of suitable ARM systems. Handful of A72 cores, generally come with more than enough of a GPU to drive 2d, important: At least a couple of PCIe lanes for an SSD. I'm sure by now there's more suitable systems but an RK3399 is sufficient, originally a chipset for set-top boxes (hence why it has a beast of a VPU (for its price and age) which can decode 4k h265). Bought the board for about 100 bucks back in the days, what, three or four years ago. Actually I should hook it up to a monitor and check out those fancy new GPU drivers that have been coming along, the thing is vulkan-capable (back in the days I was stuck with a gles blob, and using the VPU meant using an overlay).