simulating single owner PPA using different locations and system parameters

Hello, 

I am looking to understand the various system outputs and costs for ground mounted solar projects under a single owner PPA for my study area. Rather then using one location, I would like to run my simulations at different locations in my study area using a list of lat and long values acting as the centroid of a parcel of land in my study area. Because each parcel is a different size I would also like to size the PV system based on the area of the parcel, assuming a relationship between area in acres and output in MW DC. 

My goal is it iterate over simulations of system capacity at different locations. I have tried to put together a python script using pysam but have been running into issues. I am not sure how to iteratively change the solar weather file and the system capacity before running a simulation and saving the results. Any help would be greatly appreciated. 

I've attached my python script for reference. 

Thank you, 

Adam