I hate to sound unpleasant, but I'm calling bull**** on a couple of things here. First of all, there ain't 100 trees in this country over 200 year old, much less 400. WRT to cutting osage, I'd rather cut osage than post oak. I've cut trees, both live and dead, 14" on the butt end with a $99 el cheapo 16" Poulan chainsaw. You need a sharp chain, need to get any dirt off the tree/log, and let the saw work rather than force it. Again, I'd rather cut osage than lots of other stuff. And I've seen sparks fly off a chain too, from seasoned post oak but if you run into a knot or mineral deposit it could happen in all manner of species I'd imagine.
Same thing about splitting osage. I'd sooner split osage than elm, that's for sure. Here wife is splitting one about 12" on the butt end... with a 14" hammer.
I cut my first osage tree with a bow saw. Takes a little more time, but definately doable.
More tree cutting and processing stuff here.
http://home.comcast.net/~dcm4/site/?/photos/ On topic, it doesn't matter what the land owner thinks. It's his tree and his saw. If you want the tree, bring your own saw, and be thankful for the invite.
It takes a year per inch of thickness to dry wood, they say. That said, you can make a bow from a standing tree in no less than 8 weeks. And yes, you can and should clamp it to a caul when you fast process one. Better scenario is to allow for 3 or 4 months, best case scenario, for a beginner to have a stave processed down and ready to start tillering.
Sorry for the rant... sometimes I just get fussy when my experience seems so different than others'. Not claiming to be an expert but I've cut my share of firewood, at one time burning 3 cords a winter for about 10 years there. And I've cut plenty of osage trees as well of all shapes and sizes for bow wood, two a year for the last 10 on average. Ain't nothing magical about osage, and it's better many other species for cutting and splitting.