New? $75-125k. Used you can get them fairly cheap but they are expensive to ship, set and house, plus maintenance and replacement parts are outrageous. And thats if you can do the actual troubleshooting and replacement without calling in a tech for $400/hr.
Most of them have a 3ft thick slab poured under them to keep the vibration to a minimum. Plus they run on 220v or 440v so the electricity will be a bit pricey too. I called one time thinking about renting a shithole down in the bottoms of KC and the guys at a local sales place here in town suggested a lease for $1500/mo for 5 years and then you buy the machine for $1.
Tooling, another $2-3k plus vises are $300-500 each and fixturing......
So unless you have a lead on some contracts, they'll start to add up pretty fast.