We use a pair of Lasersaurs - these are things you build yourself from plans - but you can get a machine that would normally set you back $30,000 to $60,000 for $8,000 and a TON of sweat-equity!
Anyway, the lasersaur has a tiny Linux computer inside which runs the machine and presents a web-page to any browser on your local network for uploading files, monitoring the cut, repositioning the head, etc.
If necessary, I can run BOTH of our machines from a cellphone! (or a Mac or a PC or a Linux machine or a ChromeOS machine)