i dont make much money off firewood and really dont care to... dont get many orders for it either.
ive just got a small splitter and bring home some of the wood from trees i remove for customers, the junky stuff goes into my firepit for bonfires, and the oak, ash, birch, and some maple gets cut into 16" split and stacked to be sold.
just for reference- i split some oak+maple last spring around april to early may- my friend needed wood in november. i told him i didnt know if it was "Ready" yet but i dropped off a couple handfuls for him to burn in his fireplace- he said it burned fine so i delivered a cord and a half to him, which he said all burned fine also. thats only 6 months of drying time...
we did have a fairly dry season last year, alot of very hot dry days, so that might have helped quite a bit.
a couple weeks ago i split a cord and a half and stacked it, this year its mostly ash which dries faster than oak in my opinion and have a bit more to cut and split then ill probably be done splitting for this winter. i plan to cover it this year, either tarp or plywood across the top to keep the rain out of it. i feel this should be perfectly fine for this year.
as for bonfires, a friend of mine grabbed wood from the wrong pile one time, a dead oak tree i split a few days before, and threw it onto a decent fire we had going... to my surprise it took and burned perfect... get the fire hot enough ANYTHING will burn!