The comment about chainsaw millwork being "rough" sounds crazy. I quartered a 24' long 3' diameter black walnut log with a Stihl chainsaw and an Oregon a Granberg rip chain, using a steel bracket and a nailed-on 2x6 guide rail, so my buddy and I could drag the quarters out to where a giant diesel bandsaw could work them. The rip chain cuts were like glass compared to the ribbed bandsaw cuts - you don't even need to plane the boards if the chainsaw is rigidly controlled, just touch 'em up with a fine sander. I'm sorry to say I don't remember the make of bandsaw; it was on a trailer more than 20' long, though, and looked around six feet from hub to hub.
As long as you use a sharp rip chain, the only problem with the chainsaw mill is the huge kerf. Bandsaws give you more boards and less sawdust, even counting in the extra planing.