If you are buying from a major oil company, their contracts are extremely complex.

@Adrien S. Have

@Jon Haney and if you have heating or propane oil delivery you can show charges for the fuel and the last fill.

The $600 heating oil bill + little to no rental income + PITI in January will balance your actual numbers out for the year.

Which method(s) have you found beneficial or that you are keen on? 

They all have their own separate oil tanks/electric meters etc. and there is well water.

@Oren Kachel  We're getting growth due to increased cross-border trade, some oil money, as well as the general growth that Texas is seeing as a whole.

Oil and gas wouldn't be what it is without the government taking on much of the risk through the intangible drilling costs tax credit, and the depletion allowance act deductions, and literally hundreds of other tax benefits, loopholes and direct subsidies plus the fact they have access to public land to be drilled for pennies on the dollar, and the government cleans it up once they're done. 

Hope you get another better offer :)I don’t worry until the buyer asks what the viscosity of the oil is. … 

It has been partially demolished and they are adding a host of unsightly industrial bldgs comparable to an Oil Refinery.