I buy used offshore rigs for salvage. It is a very difficult business. You can purchase a 100 million dollar decommissioned rig for 3 million to 5 million cash. Now that is just the beginning. now you have to buy insurance that is very expensive you have to move the rig remember most of these rigs of not been moved for years they have been cold stacked so you might have metal fatigue you put it in the water to float it over to your next spot hope and pray it does not leak because if it does you have another 500,000 fine by the EPA. Now find a salvage crew you can trust and while you are doing that find a few good people that you can trust so you do not get ripped off (traction motors, gears, drill bits) name it they will steal it. Get you a crane tear that baby down and sale all the scrap you might get $250 a ton on a good day. so that will make you 2 million back. Now you have you mud pumps and drawworks you should get good money dont forget these have been in seawater and that eats most of the parts up fast. If you can walk away after 6 moths and make 3 million you have done good . Hard job lost of risk. If it was easy girls would do it haha!! have a good day. take it from me there is no easy money unless you are a thief. I am not a thief so i dont know anything about easy money. Big Risk make money. PERIOD!!