Hey Johnmn,
I bought a band mill a few years ago. I wouldn't do it again, though my circumstances may be different than yours. I bought a timberking b20. I still own it, but hopefully not for much longer. It's a great machine, but I talked myself into the larger and more expensive model by thinking that I'd do a bunch of custom milling. Well, in short, no one wants to pay what it costs to come to their location and mill lumber. That was my experience anyway. People want you to come look at what they have which takes your time, then they'll tell you that they think it should only cost $25/hr to have it milled.
Maybe I would have been happier if I had just bought a manual mill for personal use, but that brings up another point: insurance. Our farm bureau insurance agent came out for a meeting and spied that sawmill sitting there. He was ready to cancel our entire policy that day, no questions asked. He didn't care if it was only for custom milling on other people's property or even if it was not in use at all. If it was parked on the property, we were uninsurable. Definitely something to look into before buying!
I don't know where you are in Minnesota, but you'd be welcome to come by and see mine if you want. I'm gonna get it fired up in the next few weeks. It's a good machine, but I don't care much for running it. It's loud, dusty, requires lots of mental math, and generally just not my cup of tea. I had seen band saw mills run before I bought mine, but I'd never spent a day at the controls. I wish I had done that before I bought mine.