You could just get a Cyclone Rake...
Cyclone Rake Lawn Vacuum Systems
Here is what I have been working on. Its a 3 point hitch leaf vacuum. It works great just has a few bugs to work out. Don't stick out very far and it will still pick up 3 55gal cans in one load.
Looks like it will work great! Nice job! How did you fabricate the mower deck boot? Will you have support stands on the unit for ease in installation and removal?
Thanks Jack the boot was made from a boot off a sears craftsman garden tractor and the whole unit will seat on the ground to be taken off the tractor. The motor will come off the unit and can be mounted to my trailer when needed to haul a large load off. But I have one question for you What kind of mount do you have for the hose on your tractor? I can't see it good in the pics I have seen. Just how it is supported. Thanks again guys I like that you guys like it.
I use 2 supports. The front is mounted to a round bar that passes through the large hole in the front frame just above the foot pegs. The rear is attached to the ROPS. See photo