I am kinda confused with your post.
1.) I don't think you can get an X5m under 30K with DP, flash, exhaust and little miles. Are you referring to LED option for 2013 as upgraded light?
2.) How much and up to what extent you have modified your other M cars? Did you do it yourself? I mean after all the M cars you have owned, and you should know by now if it's a bad idea to entertain 100K cars or not. BMW can be expensive especially on M cars and most importantly the ones around 100k and above, depending if maintenance were regular.
3.) You are from Atlanta and your planning to take you family with the X5m? Are you driving from Atlanta to Europe?
4.) Can't do sedan? Are you looking for an X5M coupe?