Some of the listings I see on this mill show it as a 3 phase motor with a variable inverter already installed. Some show other motors/setups. The 3 phase makes for a great setup and is worth extra money, just be sure what your getting and if you need a VFD to run it yuo need to know. It also shows a optional two speed motor for the same setup, this wopuld also be worth extra funds. 3 phase has more power, is smoother
and more effeicant so this a good thing even though it may seem need extra work to get it the right power it needs. If it has a built in inverter find out if it will run off 220 single phase or not. Even if a VDF is needed its still a good thing to have the three phase setup.
Most claim the castings of these mills are better than most, I have even seen some info claiming they where hand scraped ( IDK if it was for sure this model). IMHO its worth going for this mill if yuo can afford it.
Still I would also consider mills like the IH clone mill which is a very heavy machine with good castings and a lot more travel and table size. It all depends on what size machine you want/need. The Rong-Fu is probably a little better casting than the IH clone, with the IH clone being very good, but a bigger mill (about 300lbs diff maybe). Mainly its more travel on the all axis, it will be a little deeper than the Rong-Fu, with alot more sideways room need ( in the x axis). I thinkk it may have more Z axis also but its not so much that head room is a problem. Either machine would make a great CNC conversion, take pretty close to the same parts (longer ballscrews for the IH clone).
The Bridgeport taking more room than a benchtop may not be so. It all depends on what bench yuo use for the benchtop, and how much overhead room you have ( the BP will be taller). If going CNC the benchtop is probably a better choice though, depending on what jobs you wish to do. It is a lot harder to move a BP around compaired to a benchtop, and it cost a lot more to CNC. But by the time yuo enclose a benchtop for CNC there is not much diff in room needed, all though the bechtop would be more contained.
Alot comes down to what you need/want, but you want go wrong with a Rong-FU, IH Clone, or a BP.
Jess
GOD Bless, and prayers for all.