CNC Router V1.0 (For Cutting Multiple Materials)

[JAZZCNC]

In fact it may look a little overkill for what I need. I may be aiming to use more aluminium profile to keep costs down. Although I really have no idea as to how much those ally plates (gantry in the link below) would cost to have machined?

Aluminium profile doesn't always keep the cost down by the time you factor other things like fixings etc which you will need to take advantage of profile.
Granted the design of mine you have been looking at does require quite a bit of machine work and really you need a machine to build this one but the aluminium it's self won't cost much more than Profile by the time you have factored in all the hidden items profile needs and it's much stronger and neater.

To be honest how far you want or need to go depends on the type of work your planning on using the machine to do. If your mostly using it for Router type duty's IE: Wood, plastics etc then you don't need to go this far but if your wanting to cut aluminium with any decent depth of cut and finish quality then this is a minimum. Now this machine was designed from the begining as an all round machine which can do a decent job of all tasks but Make no mistakes this does come at a price and slightly makes it master of None.
If you want the best machine without having to go silly on design and work required then your much better targeting the main use and build to that. This way you get a machine that is the best it can be and give great results at sensible money and time frame to build.

If you are prepared to learn welding or can weld then Buildng from Steel will save you lots of money and is quite forgiving. It makes possible for very strong machine chassis cheaply. This then allows you to spend money where it matters most and that is on correct linear components and quality electronics.
There will be some Aluminium parts required like Z axis but the major chassis parts like frame and Gantry can be made from steel if done correctly.