I think you will be lucky to get somthing like that new for that sort of money. A good quality new cnc router with a 6000mm x 4000mm table would typically set you back about €15,000.
www.suregrave.com sell machines that are suitable but theyre not cheap
If you want somthing in the under €5000 range, ebay is probably going to be your best bet.
Coolent is not essential for cutting aluminium though it will make your cutters last a lot longer. A coolant setup can be added later and is problably a worthwhile investment. It's worth researching the different options as some coolants are not too good for your health.
I have seen some new systems that drop tiny ammounts of vegetable based oil onto the tool which cools and lubricates it without creating the mess and fumes associated with normal spray mist or flood coolant.
You probably want to budget at least €1500 for your CAD/CAM software. You can probably find enough free demos/trials to get you started but eventually you'll probably need the features only provided by the more expensive stuff so be prepared for that.
If you're doing a lot of sheet metal work then you might want to consider budgeting for a vacuum table which will allow you to hold down your workpiece totally flat without the need for mechanical clamps , glues or sticky tape.
Of course if computer case cutouts is all you want to do a CNC plasma/laser cutter may be a better option. Most wont let you engrave part way through the material but the speed is faster than any mill or router.
Then theres water cutting but neither you or I can afford such things so I wont even bother explaining further!
