I am wanting to branch out from my firewood biz and I was thinking I could work with someone to take some of the really large forked oak logs I have and saw them into nice table tops. My questions are, What is the shortest length that can be run on a band saw mill and is there anyone on here that is near Chatham Va.?
I don't think there is a length limitation on bandsaw mills, worst case, you may have to make some sort of cradle to hold short pieces.
Width is more likely to be a limitation. Small portable mills are typically limited to 20" - 24" cut widths. There are bigger mills available, but generally further up the price scale.
Wide slabs are where chainsaw mills or slabbing mills shine. Bear in mind that the slabs will have to dry for years, and some will split or warp badly. It's not a get rich quick scheme.