i would suggest trying to put the rent up to cover the mortgage. That or sell it for more than you bought but you'd have to get rid of the tenants. You'd struggle to sell it for full market value if the rent won't nearly cover the cost of the mortgage. My advice would be to ring around afew letting agents in the area and see how much rent you can get for it (or did you vale a rental val done by a surveyor?) then either get the rent to cover the mtge payments. Or get rid of tenants and sell to make back the 15%.