Zoning allows for mobile/manufactured homes as long as there is a concrete foundation to strap it to, unless the manufacturer suggests an alternative way to secure the home.The lot suffers from soil subsidence issues, however, so I'm not even sure that a foundation can be put in (see this thread for more info: "Building on Junk Fill"). 

I can tell you without seeing the property it could have pollution in the soil that could cost a fortune to abate.  

You will see soil in the actual walls.

Survey, soils, environmental (if necessary), various city or county zoning fees & permit fees, address cards, utility disconnects/taps, insurance, storm water, architectural/civil/structural, etc.  

@Ron @Ron Garner Do you have any properties in Sandy Springs or Roswell?

My favorite was they replaced the horizontal soil stacks in the basement with PVC, but didn't support the original cast iron ones that still were in place vertically...

We are located in the Sandy Springs area. 

You would need some soil/engineering test.  

So they shouldn't be saying things like "well Jim and I each paid 1/3 the rent until Sandy left!"

@Trevor JohnsonWelcome to BP,When I first got started in real estate I found a mentor that had a cookie cutter like factory out in Sandy Valley Nevada of all places selling 2.5 Acres.