There's a night and day difference from a Shark to a CNCRP Pro machine.
Doing the wiring yourself can save you a significant amount of money, at the expense of a significant amount of time.
If money is a concern, I'd go for the CNCRP Pro machine, and source and build your own electronics, including motors, and spindle/VFD. You should be able to put a high quality electronics package together yourself for about $1500.