So this is tricky. I am living in my 3rd househack now I ran into this as well more than once. Basically to make someone believe you are not trying to use the FHA loan "as a vehicle for obtaining investment properties" you have to have a "jump" i.e. the underwriters ask themselves "Why would someone want to buy a not-so-amazing quadplex in a not-so-amazing area when they already own a perfectly good, updated 2 bedroom condo in a great area close to work?" In my experience, this is also true for other types of financing for primary residences.
For this reason, many people start with a multifamily home then "jump" to a better quality one in a better area or to a townhome, small single family home, etc. Then, the next "jump" might be a larger single family home or a single family home with a garage, a single family home walking distance from work, a home with a backyard etc etc.
You basically just have to be able to justify the move with something tangible.
Your options are:
1. Buy something that is a "jump" and househack that ..so in your case, buy a single family or a townhome.
2. Refiance your condo into a commercial loan or investment property loan
3. Call, call, and call lenders until you find someone who thinks they can get this through underwriting. In my experience, its very unlikely.