Facelift, necklift, liplift and lower blepharoplasty - shall I do it at the same time or separately? (Photo)

I am interested in all the above but can't decide whether to do it all at once or separately. All together, it will require 6 hours of surgery. Would I be under for all that time? Is that dangerous? Is the trauma to the face too much and likely to lead to complications? I'm a 47 yrs old female - my friends say "you look great, you don't need it". I've already decided to go ahead with all the procedures, its just that the push back is causing me to be more concerned. I appreciate your feedback.