Good point. So what if homes have to have a single name/id attached to them, and a single identity can only claim one homestead exemption statewide (and ideally

Good point. So what if homes have to have a single name/id attached to them, and a single identity can only claim one homestead exemption statewide (and ideally states would share data) and you have to file state income taxes to get them. No homestead exemption for company held houses, no second exemptions if you're a dependent or you file married/jointly. Still not sure how one could handle the case where someone lives in a state but pays no tax, since you can do that for nearly free in a state you don't live in. Maybe it could take age into account.