Linux CNC powered Ethercat Mill Retrofit

Thanks for the info,

I am getting the Encoder battery its literally like $4 here are my cost options if anyone else needs this for future reference price is ex shipping and import fees

EL7-EC1000N - With 1000W (3.18nm) motor + Brake + Cables and Battery - $255 per Axis
EL8-EC1000F - With 1000W (3.18nm) motor + Brake + Cables and Battery - $351 per Axis
EL7-EC1500N - With 1500W (6.00nm) motor + Brake + Cables and Battery - $449 per Axis

I am not sure if the EL8 is work the $96 extra

Yeah I am looking at getting refurbed Beckhoff El2008, El1008 with the EK1100 Coupler. I was not planning on keeping the hand wheel but the Mesa card does not look to bad.

Do you have any tips for PC wise to run LinuxCNC? I am looking at industrial PC's but they have stoneage hardware for the price of a high end gaming rig xd. Would a Pi or Intel Nuc be viable here, I want to make this a decent retrofit but as a home mill I have to be realistic with the components I choose.

You are probably paying for more expensive electronic parts. Probably the cheap version doesn't have an fpga chip . I think you give most of the money. Buy the expensive version.
For PC, just choice an old workstation. You can review the latency test topic

I have used the Soyo SY-H110Z full firmware version V3.0 with a modified BIOS and an i3 8100 with low latency.
I am currently using the Supermicro x11ssm-f which has a slightly higher latency than the above motherboard but has two network ports.
Generally, full-size atx motherboards can achieve good latency