WK2 Suggestions

Coming from someone who is very comfortable doing any work himself. What would be the best year? From what I can see the 3.6 prior to 2016 is a considerably cheaper to get then 2016+. I have the ability to handle most anything that will come along, but ultimately is it worth the hassle if I can do it myself? or would I be better off getting a wk2 2017+? Just asking from the standpoint of a someone who is comfortable with doing the work.