Take an inexpensive CNC lathe from eBay for $1200. Generic post for use with all common 3-axis HAAS mills like the DM, VF, Office Mill, and Mini Mill series.
One main difference is that LinuxCNC is open and extensible where Centroid is closed and you will get charged for every option. Linuxcnc vs centroid Heidenhain fell from #3 in 2012 (9% share) to #5 in 2016 (6% share).
