Chris,
I have a customer that also works in the Natural Stone Fabrication Industry... They work with Granite, Marble, Ceramic & Porcelain Tile... To process their parts they use a 6' x 13' - 3-Axis Waterjet and Gantry Design Table Saws with Tilting Tables and Articulating Spindle Heads. There was not a large gap in price when these machine were purchased... However, if you were to compare man hours per part on each, you would see that processing the parts on the waterjet requires 35 ~ 35% less man hours...
Attached is a feed Rate & Cost calculator from
www.wardjet.com , Compare it to your current process....
Regards,