Jazz, first of all I would like to thank you for your help, I really appreciate it because I have not received any help from these forums and I do not know how to get started. I have decided some things but before buying any products I would like to be certain so as not to regret it later.
I need a CNC to produce aluminum moulds and be able to produce products with less hard material such as poliacetal or mdf. I am an Industrial Designer and I work with software such as Solid Works and Rhino which help me to verify movements and assembly. I know a little about dimensioning structures but I do not know anything about electronics. I am trying to use the tools I have and reading a lot to be able to build the CNC.
You asked me about the measures of the CNC, and I believe that with the axis X 1m, axis Y 1m, axis Z 0.3m I will be able to manufacture the pieces I need.
I did a 3D model to verify the dimensions of the metallic frame, I will attach some pictures so that you can give me your opinion, because I have problems starting with the linear movements and the electronic, but regarding your observations I will be able to change them.

Axis X :
HIWIN Brand linear guide rail 2PCS HGR20-L1000mm+4PCS HGH20CA HGR Series Narrow Carriages ZH075 - 337 uSs
RM2005 Ballscrews L1150mm with ballnut with end machining+1set BK15/BF15+coupler - uss 164

Axis Y:
2pcs SBR20 -L 1000 mm Linear shaft Support + 4pcs SBR20UUBearing Blocks - uss 179
1antibacklash ballscrew RM1605-1020mm+BK/BF12+coupler - uss 149

Axis Z:
2pcs SBR20-L300mm Linear Bearing Rails + 4pcs SBR20UU SY1860 -uss 69
1pcs antibacklash ball screw 1605 -L300mm-C7+BK/BF12 + 2pcs 6.35*10mm couplers - uss 83

Electronic:
As regard Electronics, I have read that the nema 34 has a good torque that I why I thought of using them, but I am not sure if they are appropriate for what I have in mind. There are several kits advertised on ebay for example this one:
Electronic kit on ebay:
3 PCS Nema 34 Stepper Motor with 1090oz-in (7.7N.m) holding torque,5.6A current,99mm motor body length,
3 PCS Stepper Motor Driver DQ860MA,24-80VDC,7.8A Peak Current, 256Micostep replacing MD882,
3 PCS 350W, 60VDC,5.9A Power Supply.
1 PC Breakout Board & 1 Parallel Cable
Uss 480.

Jazz thanks again for everything and I hope to be able to assemble the Cnc and learn something about electronics with your help!