Sharon: I don't believe that VA "puts down headstone" - I think it furnishes markers which one may place - presumeably with the permission of the cemetery. I checked USGS' GNIS database and indeed found Old Mt. Zion Cemetery. I also went to the Sumter Co., GA GenWeb site and found it listed as "Old Mt. Zion Methodist Church Cemetery". At least I think that it's the right cemetery since there are no others with a similar name. The list seems mighty complete and was done by the archivist with the Sumter Historical Trust. Further, he also did a survey starting in 1985 and used, as a guide, an earlier survey done in 1972 by others. Additionally, another individual completed a survey of the cemetery but I don't recall the date. Interestingly, all of the surveys list the same 8 individuals with the surname of SUGGS but none list a marker/headstone for a James SUGGS. The earliest SUGGS burial is 1875. So was this marker/headstone missed by all three surverors or, more likely, was it placed after 1985? I think the answer is obvious. Not knowing the background of this Ancestry photo or any other details I'm clueless as to whether it is actually a VA marker or what. If it is truely a VA marker/headstone then that's probably the outfit you'll need to cantact. I'd be curious to see this photo.
Regardless of the marker, unless there is a proveable lineal descent from James to your friend AND documentation that James served in the Revolutionary War (pension, muster rolls, land bounty, etc) then your friend's chances of joining DAR are slim, at best. As I understand it, the days of creative genealogy and "fudging" are past.