4D, don't know if you caught an earlier post I made about NextWave. A number of years ago I was one of their early customers. After two days of playing with the machine trying to get it cut within reason, I made a 6 hour one way trip to his house to return it.
After that it became very clear to me that building a machine is not all that complicated. It has become quite easy using 8020 extrustions and some off the shelf hardware from folks Fine Line Automation and CNC Router Parts. I now have a machine that is very accurate, easily achieves speeds of 800 IPM, uses a standard piece of control software and I know what to do if there is a problem. Which is rare.
Cost? Under $3000 for a 48 X 36 X 8.00 machine. Time to build? Less than a week, I am more or less retired so have time for these projects. It has a solenoid to turn the router on/off from the program, auto tool touch with a second pad for multiple tool jobs and on the front I created a recess so I can easily do tenons on a piece. Very accurate tenons since there is no flipping the part over and relying on how thick the piece was cut.
Quality costs unless you have the time to do it yourself. I am not surprised by the cost of a machine at 5K plus. If I had to build my machine on a production basis it sure would not sell for 3K.