You want it good or you want a ripoff to sell to a punter ..

Anyone can sell you servo motors, proper couplers, and a csmio-ip-s controller.
(The cslabs csmio-ip-s is the best, but it starts at 500€, and a full lathe setup is about 1500€. I know, I have 2 ).

Saving on the servos (I have over 17) Is silly.
Not using 220V servos is stupid.

== it all works out relatively expensive, about 7k.

After over 6 different versions I built to avoid the 7k cost, I will never do that again.
Itīs vastly cheaper and better to do it right, once.