The GC will also be able to do the work more quickly, assuming he is well equipped and has a good crew.

No water/electricity during the visit so impossible to test AC, well equipment and other appliances... 

I'd rather buy cheap and have reputable contractors put in new quality equipment than buy average properties that are functional but I have no idea the maintenance or service life left in these major systems.  

As a wholesaler, you can state that you have never lived in the property and have no knowledge of defects, materials, mechanical equipment or amenities.

I'm seeing many smaller towers near highways that are no longer holding the equipment.  

There can be special equipment required by a tenant and equipment leased, the equipment provider may require the building owner to be on the lease or consent being responsible for removal fees.

Trucks, RVs, vacant lots, equipment?

It depends if the supply line from the street to the house is sized for the additional flow , additional meter installation , 2 possibly 3 new boilers , what about hot water , it it thru the boiler or seperate water heaters , is there room for all the equipment ?

I know that in the agriculture industry that dealers that sell equipment are also often insurance agents that sell the farmers insurance on that same equipment.

Per BTU, electricity is just about the most expensive heating fuel you can buy, but a lot depends on the space being heated, and how the occupant uses the heating equipment.