Since lots of ppl already cover laptop different options, i will skip this part.
Blender is a huge topic. What exactly does your wife exactly do? Something like sculpting, rigging don't need much gpu power. How complicated the scene is it? For a complicated scene with un-optimisted mesh, it can be expensive. The most expensive part should be high quality rendering. But you can use render farm to "outsourcing" jobs to remote hosts.
Also, it's 2024. Ww can already launch and run blender remotely thru vm and streaming technology smoothly.