Help me pick a medium sized CNC mill please!

I think my requirements are:

-Used to save money
-Full 3 axis (no knee mills with 2 axis CNC and a manual quill)
-Automatic tool changer with at least 8 tools
-Enough rigidity to hold 0.001" tolerance at 50ipm, 0.150" DOC full slot in 6061 with no chatter and excellent finish. If it can do that, Im pretty sure it will be able to do whatever else I need to do any any material I will need to do it on.
-Fully enclosed or capable of easily being fully enclosed for cleanliness
-Able to have a coolant system
-18" x 12" x 12" working envelope (i.e. I could machine any edge on that size cube)
-Will fit in the space of a car (so I can use up one of the car spaces in my two car garage)
-Enough reliability to make production quantities of parts (i.e. 100 aluminum intake manifold flanges a day, for instance.)

My experience is sort of odd. At home I use a sherline CNC mill, at work I use a fadal VMC3016L. I definitely need something bigger, more rigid, and faster than the sherline, but I definitely dont need something as big as the fadal.

Please help! My budget is about $7000 max including freight, tax, initial fluids, start up costs..i.e. everything to be ready to go.