I'm a big fan of flying and its more than just a $ thing.
IMHO....we all (well...most of us) crave more vacation time from work and I'm not prepared to give up (what could amount to 3 or 4 days) of my time.This is aside from the fact that I hate driving anywhere

(i can't understand why folk think driving mile after mile and hour after hour is fun..

).....oh well...maybe its just me !
Now....lets put aside my personal preferences and look at some other facts.
It not entirely accurate to say that it costs X number of $ to drive down (based on fuel and hotel stay).You also have the incalculable wear and tear on your engine after driving several hundred kilometers as well as the wear and tear on your brain (if your the only driver) because if you drive all night ....your zonked for the following day.
Sure.....there is no doubt that the drive down is probably in the $600 range......but I cant put a dollar value to my time and peace of mind.
If I can get a DING,drive and park in Buffalo,rent a car using one of the codes available (all for about just over a $1000).....the extra $400 I've spent is worth every penny to get a 10 day holiday instead of 6 or 7.
Jusy my humble opinion.