I think it varies on the person. Money can buy you happiness if you have enough of it. For instance, you literally buy friends with money, there are superstar athletes that have tons of friends and it's not just because they are nice guys, wink wink. Plus, if you love sex you could buy hookers all the time. And for someone in our situation with SAD, money could buy you the best psychiatrist and counseling money could buy. And of course, money could buy you a spouse. Both males and females will be fond of a member of the opposite sex with money. Of course there is the whole are they doing this just for my money problem with all these things, which could be the case but not always.
As for me, money would make me happier than I am now because I could afford to move out of my parents house, get a better car that is more dependable, I could drink and gamble more, I could get a better tv, computer, better furniture, get a podiatrist or different muscle doctor's opinion on my leg and possibly surgery if needed, and i could get a treadmill. Yeah, money sure would help me out and i wouldn't be as depressed. It probably wouldn't be a full cure to my SAD, though.