They are out there every where at 1/3 the price that will do the same job, there is not $16,000.00 in that machine the new router they are building, the Gantry is of very poor construction, they are not machine designers they are fabricator's there is a big difference, when it comes to building a machine that needs to perform as you have found out with your own Router you brought, anyone can weld some pieces of tube together
Here is one of many that will be good enough for any Plasma job, they are dime a dozen out there, a Plasma machine is something any hobby guy can build with ease, there is nothing that has to be as precise as a router build
They can be light weight construction as there is no loading or cutting forces on any of the axes of movement, Z axes in normally just an air cylinder for up/down