A bit, I ran a woodmizer for a friend while he was away in Nigeria making a mint on seismic surveys.
For a few small butts I'd run them into a sawmill with a bandsaw and have them contract sawn. The small portable bandmills probably cost over GBP300/day and it's hard work getting a worthwhile throughput.
Have a look to see if the woodlots advertising service still functions near you.
Punters tended to be optimistic about what they where going to use their sawn wood for and I'll bet there's a lot of planked wood slowly rotting away in some back gardens. Truth be known I still have some nice yew boards which would have been worth a lot more as round timber exported for veneer and I know Ill not make anything with them.
Sycamore needs converting very soon after felling, the loose sawdust must be brushed off the boards and they season better stacked vertically rather than conventionally stickered.
AJH