Understand that it is perfectly possible for a married couple filing joint to each have different SLR's (State of Legal Residence.) This is not at all uncommon for married couples when each are from a different state. This type of scenario is most prevalent for military personnel, but is not restricted to only the military.
Is this doable, even if she is working full time in Wisconsin.
No, not for your wife. If your wife is staying in WI for the next 4-5 years for a full time job, then your wife is a WI resident any way you look at it. She just doesn't fall under the "snowbird residence" rules for FL and definitely doesn't "not" qualify as a WI resident. FL doesn't tax personal income, so no issue with state taxes in FL. However, for 2019 you will be filing a "part year resident return" for WI so that only the income earned in WI by your wife is taxed by WI.
I would be splitting time between the two states, varying amounts of time
Can you clarify that statement please? I'm curious to see if you may qualify as a full year resident of FL so that even retirement pay you may receive if any, may not be taxable by WI.
