Choice of a laser machine

Hello every body from Switzerland!!!

I'm a industrial designer and I want manufacture a self-design product in very hard plywood (aviatic plywood) in 3 millimeters.
The pieces are now milling with a cnc that I made 5 years ago, but we want now buy a laser cutter for don't make the hand finition in the wood and for be to speed.

The hight compagnies has Epilog, Trotec are very too expensive.
I have make a research and selected differents compagnies. I want just know if you have experience with :
- Jiangsu Keyland Laser technology Co.
- Iehk
- Jinan JinQuang Laser CNC Equipment CO
- Jinan G.Weike Science & Technology Ltd (maybe the best?)

We want a cut surface of 600x900, but the door of the workshop is exactly 1 meter. Compagnies submit to cut the shell in 2 parts for go through the doors. Have you experience with this modification? The work is proper?
I'm precison mechanical and designer, not engineer and I don't have the knowledge for repare electrical or informatics problems. I want just be sure that the installation and the using are simple and friendy.

Many thanks for your futures answers!
Gazouille