Instructions
Right-click on all of your properties and select "Collect All Rents." This is effectively borrowing money from tenants, and you can only do this once. Your bank balance is displayed in the top-left corner of the screen. Since this is a strategy game, hitting your tenants up for early rent may make them less likely to take care of the property. This can cost you money further along in the game.
Purchase a plot of land. Find a vacant lot somewhere in the town, right-click it and select "Purchase" from the options bar on the right of the screen. Drag your preferred building type from the menu bar on the left.
Select "Build Peep Show" from the options bar on the right.
Go inside the building and right-click in one of the empty rooms.
Click on the options tab. Purchase a pair of "$100 extra heavy curtains." This command is an upgrade trigger. When promoted, select "Upgrade to Brothel" and your peep show becomes a brothel. The premise of the game is that you have a legitimate business, such as a peep show or bar and you convert them into illegitimate businesses, such as a brothel or drinking den, behind-the-scenes.
Go to "HQ" and look for Carlos' icon. Once you see the icon, right-click on it tell Carlos to go into the brothel.