I may be wrong, but: If you sell it later, even if you sell at a loss, you will owe capital gains tax if you have depreciated the property (i.e., taken all the deductions you are legally entitled to) on your taxes. The IRS gives you 2 years to rent without having to pay this tax, so if you sell before 2 years of renting is up, this will not be an issue.
So basically, you may owe more money than you will if you sell now, even if the property appreciates. Check the IRS website or consult a tax expert to make sure.