Sometimes buyers like vacant property and other like occupied property. You have to see if prospective buyer wants the property unoccupied at the closing. You want to keep your tenants and it is a good idea to do so because you have your monthly income .Not only that, It is occupied and so insurance company will not stop covering it. The city requires you pay taxes which you get from rental income and if you have your property vacant it is a loss. Other thing vacant property is easy to be vandalized by intruder and you do not want that. It seems to me .