NIR can make a bit more than their standard DR counterparts depending on their practice setting (+100-200k). Lifestyle is terrible; you are usually on call for a whole week block and alternate call depending on how many people cover stroke call in your group. Jobs are pretty much restricted to regions with large groups/groups that cover stroke centers; It is much easier to find a job in DR than NIR.
NIR requires 1 year internship+4 year rads + 1 year neuro DR fellowship + 2 year NIR fellowship (total of 8 years).
If you are a medical student I think you should highly consider neurosurgery residency over the NIR pathway. NIR doesn’t provide a much better lifestyle and your skillset will be much more extensive as a neurosurgeon. Neurosurgeons perform endovascular interventions and you can specialize in NIR as a neurosurgeon.