Routers can make a huge mess, that can be difficult to contain at times
Good point Gerry, so I'd also need an enclosure, for mess and sound

Nearly impossible to answer accurately because don't know your skill level and how well equiped you are
My skill/experience is zero, but I'm a good learner when it comes to making things.

My worry is that a) it may take me too long figuring out how to make a machine when I want to get on with using it, and b) when I do make it, as its my first attempt, I may make mistakes, resulting in loss of accuracy.

I think I'm going to ask someone to make a decent machine for me!