Oh I just thought of something.
Buy a mansion, put a Roman Bathhouse in there, put a Praetor's room, a centurions room, (I'll make it Roman themed).
Then have a huge room with computers (500 in total with 3 per one person) with tons of wifi.
This would be the ultimate gaming experience. I would have tons of security cameras in this house.
In my Praetor's room, I would have the ultimate gaming experience in there as well has having a good bed, and lots of other things. Of course the computers would be in a different room.
I would have TWO Praetor rooms though. I would add a movie theater in the mansion, I would have a pool, a secret hide out for me and other people, invitation cards, infrared cameras everywhere (except one spot), I would add more bedrooms as well.
A separate room for friends /family to visit, security guards.
I would buy all of the old run down buildings and house the poor, and assist them financially if needed.
Edit: I'll add everything when I can think about it.