FHA will not insure a mortgage if it is determined that the transaction was designed to use FHA mortgage insurance as a vehicle for obtaining investment properties, even if the property to be insured will be the only one owned using FHA mortgage insurance.
For additional information see Handbook 4000.1 II.A.1.b.iii.(A)(2)(b) available at https://www.hud.gov/program_offices/administration/hudclips/handbooks/hsgh