What money making method do you use? Is it effective?

[Tomo]

The easiest way of making money is going into the construction market...

Simply offer yourself to build stuff for other people.
Easy 15-20k for each build. I have made about 200k in a single afternoon doing just this.

Building and selling is good but it's also pretty dependant on if you're a shit builder or not xD

Never done it myself but it seems like those players who make casinos roll in the cash. People will bet on stuff even tho there's a tiny chance of them winning anything and you just have to sit there laughing as their money falls into your pocket. 

I speak from experience... of losing money... lots of money... to casino owners...