re: Made money on a house they sold after 1 year?

Lots of factors that you may not know about. Having dream home in a year means that they may have savings or an income stream that you aren't aware of. The fact that they felt comfortable renting a new house before selling their old tells you that money is coming in somewhere.
It is possible to make money on a home in a short amount of time. Look at areas around BR. In places where lots of flooding occurred, houses that didn't flood are selling for several thousands more.
It's also possible that your friends sense how over interested you are in their business so they blow a little smoke your way.
You'll be better off once you stop caring about what every one else does. Yes, friends with lots of money can be annoying and boast. Make new friends or learn to deal with it. If you're asking about it here then obviously you can't trust them. You don't need friends like that.