Possible Lot deal in SE Atlanta 30317- Need help with deal structuring

[Fitzgerald Hall]

Hello all,

I have a lead on a lot located in SE Atlanta 30317 with a lot of potential. 

I am having trouble structuring the deal because the lot is zoned RLC which has a condition that states that only a law office can be built on the property. 

Rezoning will take about 3 months and cost about 1k. Rezoning shouldn't be a major issue because its surrounded by residential properties. 

How should I go about structuring something like this without paying for the property upfront.