Get $50,000:
When at the Lieutenant Section Type I LOVE HANSON (all caps) to get $50,000. 

Free Business:
In the Gang Organizer, go to the city maps. Bring up the info on any business 
and let the mouse hover around over the box until a little 'Return to base' 
tip appears. Click there and tada, the business is yours. If you want, you 
can sell it on the spot and the cash will go directly into your assets. Or 
you can wait until next week when you can send someone to run the business. 

$3000 For Gangs:
At the Lieutenant part of the gang organizer screen press D + A + R + T to 
give $3000 to each gang.