DTA has some good points, but "gigantic legal trouble" is a stretch.
Insurance, call your company. You can change between landlord and homeowner policy at will. Can also get a rider for contents if you're on a landlord plan.
Taxes, either deduct mortgage interest if you have any for the portion of the year you're occupying and deduct everything else by law when you're renting, or rent it under the table. Both ways work. One is more legal than the other.
Know that rental deductions are limited and not allowable at certain income levels. Take a look at that if you're diving into the financials of it.
