Student loans into mortgage?

[Sadierose Saucier]

Hello everyone! 
My fiancé and I currently own 2 multi families under conventional loans (a 3 family owner occupied for 3 years and then moved out to owner occupy a duplex). We each have FHA available and are looking to move forward with those soon. However, my student loan payments from dental hygiene school are limiting my investing power.
Has anyone ever rolled their student loans into a mortgage? I’m assuming it’s not possible with FHA, but maybe a local credit union? Any advice would be greatly appreciated! 
Whichever duplex or single family we buy next will be used as an investment property, therefore tenants paying my student loans. 
I have about $60,000 that I would be rolling in. Thanks!