Houston Triplex Build Advise Needed

[Patrick Ferraioli]

Hello all, 

I have a small infill lot in the Sawyer heights area of Houston I'd like to put three small front to back 3 story townhouse style units on. I've looked through the municipal codes and I can accommodate the parking requirements for what I'm looking to build. My lot is only 3000 sqft, but it has front and rear entry onto the lot so access for two garages with required setbacks is possible. 

I'm looking for recommendations on an experienced builder who can help with parsing through and understanding the other multifamily development requirements and variance rules to see if what I've done as a prelim design is even possible, or if I will eventually have to plan on a duplex instead. Additionally I had hopes of being able to complete the project for under $130 sqft for approximately 3500-4000 sqft of living space excluding the ground floor parking. Am I completely off base in my assumptions?