One property is yellow, the next is green, another is blue, etc.

Duplex would be in a more blue collared area, and a SFH will likely be in an area that has more professionals you are aiming for.

There's really no way to assign costs to any construction work without a detailed scope of work, preferably blue prints.

I've own a SFH in Westwood and it's one of my best cash flowing properties that I bought a year ago because Westwood is now in higher demand with its revitalization.The park in Westwood is being developed by the same company that built Summit Park in Blue Ash.

Deffinlty blue collar, but solid and stable rents.

My personal experience having duplexes (older ones) in Wichita -- I've owned 2 since 2006 -- the first one parlayed into up to 10 doors at one point - so it panned out alright -- anyways turnover was higher than what I've had in more blue collar single family  homes. 

All - I like the properties I see in Blue Ridge GA.

Apples to Oranges but we have some well performing STR's here in FL in blue collar neighborhoods.2 - Are you willing to do the work?

Later we were building MTRs in blue collar neighborhoods.

@Thomas Blue I access this on realtor.com.