@spartacusve
I used google translate to provide me with an English translation of that website.
The reference to using CO2 with LEDs has more to do with the lower operating temperatures allowing the CO2 to remain present in the grow area before its exhausted from the grow area. Yes, CO2 does allow higher levels of light to be used which in turn drives photosynthesis. Yes, it allows you to grow larger plants faster ... but is it worth all the extra expense right up front when you're getting yourself set up? CO2 can easily be added at another time later on down the road. If this were my project, I'd focus on getting your vegging area, your flowering area, and your area separate from the rest to keep your males. Right there is 3 sets of tents or rooms and their lights. Many breeders run with more ... they might have a mothers area and possibly even an infirmary to care for unhealthy plants.
The light I suggested earlier could be used in your current setup with the light dimmed down and then moved to a larger tent once you purchase it. Your current light is ample in size for the current tent and can be moved back into use for your seedling and vegging nursery. Then once you have all areas operational, you can add CO2 and other upgrades. In the meantime, concentrate on getting yourself up and running first.