not sure on the weight factor
but i can tell ya that a good load in a 8 ft pickup box at its best is just a half of chord and closer to a third of a chord..as for cost factor around us it runs approx 125 chord and the heat index on good wood beit oak or ash or hickory or cherry for instance is that those woods will heat my house for aprrox 600 dollars and 600 dollars of propane or fuel oil at last years prices wont.
If in Doubt, Build it Stout!
One hand washes the other!
Don't put off today till tomorrow!