If i had money to burn, I would put an extension on my house and build a gym with all the best equipment. I would install a top of the line sound system too. 
I hate people, so right now I train at 4:30 am when the gym is virtually empty. I don't need other people to motivate me.
If i built my own gym at home, I would probably find a good training partner and charge him 500 bucks a year for a membership at my gym. lol jk
Exactly, I prefer gym time to myself
so I don't understand this:
This "social facilitation" phenomenon is well documentet in scientific psychology. It's easier to work very hard physically in the presence of others.