Here is a load of wood being delivered to one of your yards this morning. This wood is oak offcuts from a Devon sawmill strapped in tonne bundles. The truck can deliver up to 26 tonnes at a time and has a nifty crane with a good reach on it for unloading. We are going to let the wood sit in the sun and air to dry a little before cutting it into more manageable lengths.
Sourcing wood from a local woodland or sawmill in bulk can make good sense if you have the space to store it. How dry your wood is probably the most significant factor to how much heat you will get from your stove, how well it burns, and how safe it is. If you are in charge of your own firewood then you can make sure that it is well seasoned, storing it with good wind access for at least a year, if not two for some types of timber. Burning water just doesn't make sense: you waste lots of heat boiling the water away and your chimney will quickly tar up which increases the risk of chimney fire.