I think the biggest question would be what type of cues are you going to want to build? Intricate cues like Tikkler's Black Boar or cues with simple designs and/or round inlays?
I'm just about to order a new machine this week. The spindle alone is more than the total cost of my current machine. Hell, I'm paying more for a custom upgrade that' going to delay the delivery of the machine by a couple of months than I paid for my existing machine.
You could buy the Breeze or Storm from Lee. You can't do tapers on the Breeze, but you can do inlays. If you already have a taper bar on your lathe, you really don't need the CNC for tapers anyway. You can cut points with it, although I'd recommend the Kress Router for that over the stock spindle. I don't really recommend the Kress for inlays though unless you're going to do everything into Ebony and use a lot of black epoxy.
I'm not sure what lee is charging for either machine, but then you're going to have the software expense on top of that. I think no matter what, you're looking at $3-$4K to get started.