Its not hard its just more elbow grease...or as we say in Denmark "knuckle fat"
Get a nice 5lb small sledge, take the abs off if you have it, if you dont, its easier. If your going to remove it ever, nows the time
Also I suggest getting 1 extra nut, you can use it to tighten the stud. I did this on my explorer and took me an afternoon, But I didnt have an abs issue, but i did do all 5 on it, cuz I dont like doing things twice.
The best advice I can give you is:
DO ALL 5
Seriously, dont fuck around....
When one goes it puts strain on the others, obviously your putting pressure on the studs for them to strip & break. The rest MAY be weakened. Do you want to loose a rim going down the hiway and die?
You can FOR SURE do it yourself, just take some time on the first one, and the rest is pie.