What a waste of wishes! Wish for the ability to turn any building any color any time you like, then move on to hookers and blow or something. You can give a man a fish or you can teach a man how to magically make the White House fuchsia any time he likes…
When was the last time someone built a pyramid? I think we are overdue.
I would build a pyramid or 3 in remote locations and fill them with Indiana Jones type booby traps and all kinds of meaningless but profound looking symbolism so people for the next thousand years would be trying to make sense of them.
Better have deep pockets…I seem to recall that an estimate of building one of the Giza pyramids would be something like $5 billion.
I really like this idea. What could we plant to make future generations think we were incestuous chicken fuckers?
I’d set up a true vanity project: books that would interest me and probably only me, with a huge inhouse research staff. Want a three volume History of the Ottoman Empire in WWI? No. Want a lavishly illustrated coffee table book on the history of the sawing a woman in half illusion? Not really. A well researched history of the relationship between networks and their affiliates? Are you serious? Welll I don’t care, because this is for my own niche interests.
if it was enough to change my life (retire), ?
hell yea, I’d move to the mtns.
Design a backyard anaerobic digester/biogas BBQ grill.
I’ll need a few minions, a lot of tools and equipment, a lot of experimentation (may need a lab - may just send out samples), and probably a bigger back yard.
build one of these.
Buy some bookstores - good old fashioned bookstores where you can put your rump in a cushioned seat and sample books all the livelong day. Since I’m filthy rich and have no need to make these profitable, I can put one anywhere I like. 
I will buy an enormous ocean-going sailboat and spend a couple of years sailing around the world, stopping anywhere I like, doing anything I like.
I will buy an NFL franchise, an NBA club, an MLB organization and an NHL team so I can have a sporting event to attend in every season, year-round.
I’ll buy a mountain and an island and no one comes or comes without an invitation. Yes, I’m old and curmudgeonly, but since I’m filthy rich, that translates as mature and aloof.
I need a monkey butler. 
I have always wanted to run the Road Rules billboard campaign no state will do.
“If you’re being passed on the right,
You’re in the wrong”
“The speed limit here is 70.
The law says keep right.
This does apply to YOU”
“If you’re driving 55…
You’re an asshole”
“No, God did not ordain you
to enforce traffic laws
Move over, let them pass.”
“If it is raining or foggy,
TURN YOUR DAMNED LIGHTS ON!”
On giant billboards next to the interstates.
If I’m rich enough I’ll buy all the teams in the NFL, NBA, MLB and NHL teams, and I’m mash them all together into one Huge Sport.
I worked with a guy named Charlie who said “If I ever win the lottery I’m going to buy a flat bed truck to junk my cars on.” It made me realize that people have very different views of being rich.
Personally I’d buy an 8 foot chainsaw carved statue of Elvis and hire some strong lads to carry it around wherever I went. I would always get my way because everyone would know that I was the dominant male in the room.
Start a run for President, and use every speech to call Donald Trump an asshole. And place ads right after his ads calling him an asshole in TV-acceptable terms.
Along the lines of the robo-calls before, find the call center where the spammers from the Windows Company work, and put massive amounts of Ex-Lax in their water supply. They can stop crapping all over us and start crapping all over themselves.
More seriously, there are lots of cool hotels out there - ones in lighthouses, ones in ice houses, some in castles. Visit them all. We stayed in a caboose last summer and it was great.
Howard Hughes bought a local television station in Las Vegas. He used to call them up and tell them whenever he wanted them to broadcast a movie. Sometimes the station would go off the air because he was deciding what he wanted to watch. Other times he would get bored halfway through a movie and tell them to switch to a different movie. Or if he liked a movie, he would tell them to play it again.
In Hughes’ defense, this was back before there were VCRs and DVD players.
Depends on how much money we’re talking about. One of my dreams is to put up a giant statue of a guy holding a croquet mallet on the east shore of the Mississippi across from St. Louis.
That sounds like quite a few (apparently profitable) reality TV shows.
That is AWESOME!
I’ll just mention the bare bones of my plan, lest someone else here play copycat.
So, I’d have a really cool sedan chair constructed. There’d be four crews each consisting of eight incrediably strong women, with each crew assigned a six hour shift. A smaller crew of grape-peelers and jesters would round things out. No mimes, no jugglers; this is a serious plan.
Buy up as much rural land as I can in my county and the surrounding area. Then place permanent conservation easements on all of it. Not just because it would preserve so much land, but it would also be a huge “screw you” to developers. Maybe I’d buy up controlling interest in development companies and force them to follow proper practice instead of just chasing money.