Hey Marco, you have any plants go into flower? I have a wifi cut that looks to be 1 1/2 - 2 weeks in, it's the only 1. I'm guessing all of this freaking rain n overcast days are the culprit. I have 6 others at the same spot showing no sign of flower, different cuts though.
You will prolly have heat issues in summer with this set up therefor I would use garage as lung room. Exhaust 8" grow into garage to build humidity n a 6" exhausting garage when humidity is too high. Use vapor pressure deficit to set humidity to temps. Make passive intake to grow room 2-3 times...