Business master Trophy in Monopoly Deal
Use a "Double The Rent" card on the full dark blue set with a house and hotel.
How to unlock Business master
You will need to set this trophy up in the following way:
1) Play (or steal) property cards of Park Place and Boardwalk. Property wildcards may be placed in lieu of either or both properties to attain this monopoly. It is important that you not complete your third monopoly of the game either with this monopoly or during this setup, as this will end the game.
2) Play a House action card, followed by a Hotel action card (this step will earn the Investor trophy), on your dark blue monopoly.
3) Have a "Double The Rent" card in your hand.
4) Play a Rent card (must be blue/green - omni-color Rent card will not give you this trophy, for some unnamed reason); this step will earn the Rent basics trophy.
If you are following the Roadmap and are thus playing against a Very-Easy level A.I opponent, then your opponent will not play a Just Say No card. Given the rent this play will incur, this will likely end the game.