The artist won't be able to do it legally.
For prevention of infection, there are a couple requirements:
1. There's a licensing requirement from the Illinois Department of Public Health, which requires an inspection. Approval requires a sink (that is not portable) in the work area. (Section 797.1400 f) There are other sanitation requirements as well that would be difficult to comply with.
2. Carpentersville has a licensing requirement for tattoo artists. We have never pursued looking into this, given the sanitation requirements above.
For more info, here's a helpful summary from Google AI: