Furnished properties attract a higher rental price, they also allow a tenant to move in quickly. Many tenants look for furnished properties as they are more convenient, hence you may be able to rent more quickly. You can also deduct a percentage of the cost of the furniture from your tax liability.
HOWEVER
You are liable for any costs involved in maintaining and replacing the furniture.
You are also responsible for the contents insurance. Also some tenants prefer to put their own mark on their home, which also means they may stay longer if they have invested in a property.