Mike,
I know you're just dreaming at this stage, but down here a 10 year old osage sapling will only be an inch or two in diameter. I planted a row of osage seedlings in Nebraska when we moved there in 95 (the extension office gave them away) with the same plan you had. When we left 12 years later about 6 of the 25 were still alive, only a couple were taller than I am and nothing was over 2" in diameter. If I'd been diligent about killing the grass around them and kept them watered it'd have gone faster I'd think. 8 rings/inch is a pretty nice piece of osage down here and I have several that are more like 15/inch. Only once have I seen quarter inch thick osage rings. A large diameter tree is very old, which makes OO's find really special.
I like that you planted some osage, just want to caution about how fast they'll be bow-ready.
George