We are based north of the perimeter around Atlanta in the Cobb county area.

The broker does know I am an investor and not been in the house and only walked the perimeter.  

It was remediated by professionals who originally thought they would be completing the re-installation of the  drywall they cut out in a 1700 square foot raised bungalow basement, 2 feet high along the entire perimeter and interior walls for a laundry, 2 bedrooms,4 closets,  a washroom, family room, and mechanical area. 

You could also address this from the inside if you wanted - you can have a trough installed around the perimeter of the basement that feeds into a sump. 

One demanded that I "stay out of his perimeter" which is really weird.  

But for FHA loans specifically the home must be from the factory on location, have the tongue and axles removed, and ideally have a mortar-based skirting, which means a 12x12 inch concrete base under the skirting around the perimeter of the home.

I brought in a couple loads of loam and regraded the area around the perimeter of the house so it now slopes away from the building instead of towards it.

I realized I was never going to reach my goal if I didn't jump on a house that I felt was within my perimeters.  

Since then, we have had to have mold remediation in that room, plus the master and hallway, and are now looking at having a drain tile put in around the entire interior perimeter.

HVAC replacement is major expensive.Walk the slab perimeter and look for washouts where water looks like it might be flowing underneath the slab, this can indicate broken drain lines.