HUD only allows a borrower to have 1 FHA loan. Unless... according to the 4155 there are 4 scenerios that allow an exception to this rule:
"A.Relocations. If the borrower is relocating and re-establishing residency in another area not within reasonable commuting distance from the current principal residence, the borrower may obtain another mortgage using FHA insured financing and is not required to sell the existing property covered by a FHA-insured mortgage. The relocation need not be employer mandated to qualify for this exception. Further, if the borrower returns to an area where he or she owns a property with an FHA-insured mortgage, it is not required that the borrower re-establish primary residency in that property in order to be eligible for another FHA insured mortgage.
B. Increase in Family Size. The borrower may be permitted to obtain another home with an FHA-insured mortgage if the number of legal dependents increases to the point that the present house no longer meets the family's needs. The borrower must provide satisfactory evidence of the increase in dependents and the property’s failure to meet the family's needs.
The borrower also must pay down the outstanding mortgage balance on the present property to a 75 percent or lower loan-to-value (LTV) ratio. A current residential appraisal must be used to determine LTV compliance. Tax assessments, market analyses by real estate brokers, etc., are not acceptable as proof of LTV compliance.
C. Vacating a Jointly Owned Property. If the borrower is vacating a residence that will remain occupied by a co-borrower, the borrower is permitted to obtain another FHA-insured mortgage. Acceptable situations include instances of divorce, after which the vacating ex-spouse will purchase a new home, or one of the co-borrowers will vacate the existing property.
D. Non-Occupying Co-Borrower. A non-occupying co-borrower on property being purchased with an FHA-insured mortgage as a principal residence by other family members may have a joint interest in that property as well as in a principal residence of their own with a FHA-insured mortgage. (See paragraph 1-8 B for additional information).
Under no circumstances may investors use the exceptions described above to circumvent FHA’s ban on loans to private investors and acquire rental properties through purportedly purchasing "principal residences." Considerations in determining the eligibility of a borrower for one of these exceptions are the length of time the previous property was owned by the borrower and the circumstances that compel the borrower to purchase another residence with an FHA-insured mortgage. In all other cases, the purchasing borrower either must pay off the FHA-insured mortgage on the previous residence or terminate ownership of that property before acquiring another FHA-insured mortgage "
Keep in mind scenerio B is very hard to prove.