So, we set up everything. I'm pretty happy.
We tried to fit the desk in a way that still allowed the treadmill to be set up with the arms, but the desk was too big. So we hung the control panel on the wall and removed the arms which gives me plenty of room to walk.
When I first had the stand up desk, my fee were extremely sore from just standing. It appears that the walking takes care of this problem by not allowing too much pressure on the same parts of the foot.
I also got some MBTs to help with support.
Currently at 1 MPH, but will get up to 1.5.