Hello everyone. Total newbie here. Where do I begin?

[Jonathan]

Good to see a comprehensive and realistic specification for once!

One of the reasons I got my milling machine was to make parts for my model cars (Tamiya & Team Associated) without relying on the school's machines. This is the milling machine I bought a few years ago:

http://www.clarkeservice.co.uk/manua...s/cmd1225c.pdf

It's very expensive new, so I got one second hand on eBay for £320 including delivery and converted that to CNC. I highly recommend searching on eBay for a second hand milling machine about that size. Compared to something like a Bridgeport you'll be disappointed, but that's not to say you can't make what you need it just takes a little longer than on a big machine. I think it's a good size. You're better off with not a column mill, i.e. one with a dovetail for the Z-axis like the X3:

http://www.arceurotrade.co.uk/Catalo...-Super-X3-Mill

More expensive, but quite a lot more rigid. No doubt cheaper second hand.

Out of the materials you listed titanium is by far the hardest to cut. What do you want to cut from titanium? If it's just very thin sheet that's possible. Also I'm surprised you didn't include carbon fibre as a lot of model car parts are now made from approx. 3mm carbon fibre sheet. It's easy to cut with a high speed spindle (24krpm), but proportionately slower at the speed you'll get from the milling machine, so that might be something to consider or add later.

For the electric I'd try and get a 30A connection to the shed. If you've got a heater running, some lights and milling machine it could soon add up to more than 13A. If you decide to get a welder you will definitely want 30A.