Advice on which cnc router

Hello, I'm new to this forum.

I have my own industrial design business specialising in the design and development of motorcycles and power sports vehicles. We regularly make full scale Prototype models from auto styling clay, model board (Ureol) mdf, sla sls etc.

We have a fair bit of work coming up that will mean we will need to cut GRP female mould tools from Ureol model board or mdf. We could farm it out but the amount we will need to do means we could be better off investing in our own machine. Don't really have a budget as yet but would ideally be looking to spend no more than say 8k. I'm guessing a 4ft x 4ft by say 300mm would do for the sort of work we will be doing (mostly bike panels). As well as creating female mould tools for GRP parts we will also cut model parts for things like engine casings or headlight reflectors. Obviously we could make tools in sections and dowel and pin them together so make parts that are larger than the bed size.

Any advice would be very welcome.

Cheers Mark