Assuming there are no clearance issues with the table/nut, are there any disadvantages to mounting the motor under the table, parallel to the leadscrew?

Another of my soon-to-be-infamous-for-low-quality example images:

Click image for larger version. 

Name:	InnerMotor.jpg 
Views:	562 
Size:	48.0 KB 
ID:	4426

(not sure if the picture worked, ISP is being a pain today)

I'm hoping that a pulley system of some form would be suitable to belt-drive the leadscrew from that location.