Maximizing MF-33 Lot capacity

[Dennis Nikolaev]

I'm a first-time developer. Develop and hold strategy. 

I'm in a process of buying a tiny multifamily plot just outside of Downtown San Antonio.
I plan it for small units to serve young professionals.

According to zoning, I can put 3.696 units on the plot. However, I don't find any limits on the size of the units. The trouble is that larger units don't make too much sense in that location.

I am trying to imagine creative ways to increase the capacity of the lot. 
Perhaps build a large unit and rent room by room? Perhaps each room has a bathroom and a kitchenette(so to a tenant it is more like an independent unit)? Then how do I prove to the county that the rooms are not independent units?
Or there might be some ways to stretch 3.696 units to 4. Rezoning from MF-33 to MF-60 might be a tough call.

any ideas welcome.