It actually depends on your personal definition of happiness.
For myself money would absofuckinglutely equal happiness. It would equal the freedom to pursue whatever I wanted to without fear. It would mean freedom from the daily grind of a 8 to 5 job. I would have the time to actually teach myself to develop video games for a living, unlike now when my 50 hour a week job plus house upkeep / repairs / yardwork / etc that takes up so much of my time that I just can't fit it all in because I have bills to pay. With money I could pay other people to do those chores for me while I focus on what I WANT to do. Or, I could build myself a woodshop and make furniture for a living. What if my stuff didn't sell? Who cares, I'm set for life. I could do volunteer work around town because I'd be financially independent and wouldn't need to "work" ever again.
But then I wouldn't be the guy who goes and buys mansions either, hell I wouldn't even move at all, I love my house. I don't need a car for every day of the week, The fanciest thing I'd buy is probably a brand new Subaru Crosstrek. Just because you have money doesn't mean you have to spend it on toys or more junk, it can simply mean you are independent of the financial treadmill and free to do whatever you freakin want. If I got the urge to take my Harley on a two month road trip, no problem, I could do it. If I felt like taking four months to hike the Appalachian Trail, sure, why the hell not! If I simply wanted to sit at home and play WoW again to my heart's content, I'd be able to do it!