One question I have trouble finding the answer to is this: How many states have established the number of days you must reside to be considered a resident? Some states have nothing stated about it. Others if you google state residency, you find the number of days required to be considered a resident for IN-STATE fees at a college in the state. In states fees are much lower, so states have often established what is required to be considered a resident of the state for those purposes. But that is tied to where the student's parents live, etc., and does not apply in other situations.
Dale