The Department of Revenue for some states might be a good source of information. For example, California is commonly thought to be a difficult state in which to keep domicile in a different state. i.e. 20 day requirement to change residency when working there and a need to live in our home state 6 months. This is not necessarily so. I found that the department has an excellent description of a Full-time-Nonresident where I can keep my domicile intact in another state. Been here two years and still in good standing.