Variance for Duplex

[Jeffrey Sommer]

I'm under contract for a duplex in Port Richmond. It does not have the proper zoning but it is build out correctly. It has separate gas, electric, two hot water heaters, etc. 

Has anyone been successful in going through the variance process and do you have any tips you can provide? I'm thinking of using a lawyer but I'm curious is I can save the few thousand dollars and do it myself.