Before going on a warehouse assault have these items: pistol (full ammunition), 
Tommy gun (full ammunition), shotgun (full ammunition), magnum (full ammunition), 
molotovs (6), and about $25,000. When going to a warehouse, try to blow up the roadblocks. 
After that, stand there and shoot at oncoming gangsters with your pistol (headshots are 
essential). Then, go in to the warehouse area. Stand behind boxes and shoot the enemies 
with the pistol or magnum (again with headshots). Once you enter the warehouse, have 
either your shotgun or Tommy gun ready. Most enemies will have shotguns and Tommy guns. 
When you kill them, search for the owner. He will have puppeteer hands. Buy him out. 
Do not hit or injure him or you will not be able to buy him out and will have to use 
pressure. More than likely you will have also started a mob war. Do not bother looking 
for bombing business. Instead, check the map for the nearest FBI agent and bribe him. 
You may lose $3,000, but it is less risky. You will now have a warehouse and won a mob 
war at the same time.