I would do as much research on the home as possible in the county appraiser's web site to get an idea of how long ago it was sold for and if there was a mortgage recorded on it. 

Additional variance(s) would be needed should the Owner wish to propose a building that exceeds 70% site coverage, which would be a building longer than 42’ in length.Construction DocumentsConstruction documentation will consist of drawings that are assembled for: local permitting, sub-contractor pricing, and construction directive.

I am curious as to which if any of these sites you use?

This has been an excellent site for learning and networking and I highly recommend the podcasts too. 

The official move won't happen until August, but we are leaning towards Charlotte and the surrounding areas.

And don't be afraid to ask questions, there are a lot of intelligent investors on this site. 

Are there sites or resources that we can use?  

i do notice though that redfin has identical if not the exact same info as the mls listing, which zillow doesn't seem to have. great info, but do lmk about how to find similar prices on redfin like i do on zillow. thanks If you meander through my signature to the blog on my site in the footer, there is a post there (5 posts down as of the writing of this post) that details how to get comps from Redfin. 

I joined BiggerPockets in November of 2017, after my brother told me about the site.

I agree that even being in consideration has helped some of the finalists as other firms and developers are looking harder at the cities and specific sites.