Have you thought about going vertical with this build? It would allow a good bit of what you seem to be wanting to do. It can limit the amount of part depth (item that you are working on) but there is always trade off's. As far as having pieces that need to be milled/machined, more then a few of us here are more then willing to help folks out in that area.

What do you want realistically for your machine?

What are you going to be using it for in the 1st yr (projects you can point to and have planned and are progressively more complex [trust me starting with really complex stuff does the head in])?

What do you want to do with the machine long term wise (upgrades and production levels)? This includes the budget for now and as well as a long the road of use.

Have you started costing out the software and tools to do work with? This includes the bits and such you will be using on the machine.

I am not trying to put you off or be a jerk, the information on this forum is staggering for many folks. Also there are a lot of folks who look at it and say "I want" without really counting the cost of getting there (trust me, why do you think I am on my second machine?). It is better to step back a bit design and work the design over hard and through away more then a few of them in the process, then to build with half an idea and end up costing you a lot more then it needed to.

My current machine does everything I need and when I upgrade the spindle (control or outright upgrade of the unit) then I will be able to cut materials beyond any need I really will ever have. The ting is my machine is part of business and Jazz/Dean helped by kicking into touch so many design ideas, as did other folks. Think the design out, not just use and parts but maintenance, where and how/wen upgrades or replacement parts can be dealt with. In doing so you are building a much longer usable life cycle into your machine and will get a greater return for your investment. To the folks who helped me and keep helping others thanks and I hope this pays forward a small part of the debt I owe.

Best of Luck and ask me if you need any help,

Michael