On our Monaco Camelot, I just finished installing Bilsteins today and it was not the worst job. 3 hours for the front, 4 hours for rear and the ride is excellent from a 2 hour test drive! No more banging over pavement patches or uneven pavement.
That is for 8 shocks.
Tip for anyone deciding to tackle it themselves and have the stud top: mount get a nut splitter and just crease the nut, you don't need to split it. Every top stud nut spun right off with my short handle rachet.
Also it is tight under there! I am only 160# and found that I just don't bend as well as I use to!