Hiya KP,
Err Forget Trumpf and Bystronic at that price point. 5 times that will get you somewhere close for a resonable one over here.
Have a word with Chris Jacobs at HPC up in Halifax, the HX2515 has a 2.5m x 1.5m cutting area and can be fitted with a 180 watt EFR tube for under 50% of your budget.
5mm acrylic on a 150 watt EFR tube is going to run about 18-25mm per second linear rate with 10mm acrylic running around 12 to 15mm per second.
Drop by
HERE and you will find quite a few guys with the bigger HX machines that do exactly the kind of work you are wanting a laser for.
£50k would get you very close to 3 machines of 2.5m x 1.5m from Chris
cheers
Dave