no, its easily doable small, and compact, especially for what you need, all i meant above is you will need a water tank underneath and a suitable water pump ( £ 40 ). The other bit i say about the card and the pump, there is lots and lots of driver cards out there, when yopu have worked out what inputs and outputs you will need for your machine, then you will get good advice on what cards you need to run the motors.

At the moment, wait for one of the others to answer this

the standard sprockets should not be a problem, the more complex one, you would be better asking one of the more experiences users if they can achieve them required angles using bits, or if considerations for a B/C head strapped to the table would be the way forward from the start