Hmm... If u r not kind... U dont have to let anyone know that u will be taking back the unit in a year time. By signing a one year tenancy, no one will suspect u will take it back after a year

If u r kind enough, there are some tat really plan to shift every year too

Usually... for some items/things, it will deteriorate quicker if not in used compared to been used daily

So... rent out is better.
Another scenario... Let's say at least u just rent out a room, u indirectly 'employed' a free 'guard' to keep-looking at ur unit compare to a bare unit which easily attracts 'unemployed'