Gawdzilla,
Harbor Freight's 1/2-ton arbor press
Hope you have had a successful recovery. Health & life is amazingly strong yet fragile.
I was at a leather class yesterday (Daddy's Leather & supply in Miami, FL) and "Daddy" (Lui) showed a great way to use an arbor press to tool, install snaps, rivets, eyelets,, punch holes, etc. http://www.harborfreight.com/1-2-half-ton-arbor-press-3551.html
This press is less than $40.
By drilling a hole in the end of the riser (don't know the technical name) on the press to accept the tool shaft(s), tapping a perpendicular hole for a set screw to hold the tool shaft in the moving riser piece, you can then position your leather on a board and crank down the tool - ALL 1-HANDED. In this way you could avoid noise, extra costs & maintenance with air tools, hoses, etc. This would also be extremely portable from shop to porch to vehicle to ...
Hope this gives you and anyone else some options at a low cost with high production / control / portability