I had a scenario a bit like this, but not involving any of the states you mention above. So long as I didn't have business nexus (IE: an office, employees, etc)

I had a scenario a bit like this, but not involving any of the states you mention above. So long as I didn't have business nexus (IE: an office, employees, etc) that would come on the radar of the state, it was all clean according to my accountant and lawyer - but there's the rub in that if you have those kind of multi-state issues, you'd better have at least one lawyer and at least one accountant who know those jurisdictions and can actually answer this question.