You need to have completed at least 5 assets and have them earning you money. One of them must be the print works. And you have to have completed Copland, the last mission from the mansion.
Then you'll get the call to go to the print works.
You need to have completed the print works (Hit the Courier) & Copland because Lance appears in the cut scenes for those two and you can't have him appearing after you've done Keep your Friends Close