Single family home with 2 units

[Jonatas Melo]

What strategies can I implement to maximize rental income from my first property, which I intended to convert into two units ( Unit 1:Main house, Unit 2: Basement sun room) but cannot due to zoning restrictions? 

I have the 2 units already done with separate entrance (utilities are not separate). 
Looking for options to rent for 2 families or a big family.