[Big Dave]

Folks! You are making this too hard. People pay the surgeons big bucks to suck the blubber off. The surgeons pay salty bucks to get rid of the potential biohazard. They might charge you some trival fee (doctors have astronomical student loans to pay off) but it will be (even after rendering) oil for dirt-cheap.

The reason I did the calculation is to show it could be a good deal for a savvy DIYer. 140 liposuctions a month ain't a drop in the bucket.

The problem remains in the rendering. Maybe the best way is to take your lipo-fat to a commercial rendering plant and trade it for usable oil. Might save having your neighbors burn you out.