BTW I ended up buying a JazzCNC machine and am very happy with it. Jez is good at trouble shooting and they have helped me solve any problem that has arisen.
I wouldn't have been able to get into CNC machining without their help, which goes to show, it's not just the machine you buy but the people you buy it from.

I'm about to purchase a laser cutter and I'm looking at the used market, but what if that goes wrong; who will I call?

A CNC or laser cutter that you can't use, might as well not be there at all.

Schrödinger's laser cutter.