First of all, querty is wrong. 12 one inch holes is not enough intake. Yes you could use 2 6 inch intakes, with elbows, but it will take up alot of room. You could use Darkroom louvers, they restrict airflow...so always get more than you think. They are not cheap tho. You could also cut square intakes, and make a lighttrap out of wood or cardboard.
If you wanna cut holes in walls in an apt, that is up to you. Not sure how low key you want this, so that will be up to you. Please do yourself a favor and read, the answers are here if you search. Read Ventilation 101, it will answer alot of your questions and you will learn alot. Look for other cabs, similar to yours and see what works for them. Good luck
I've read alot, everywhere.... And no one else has a cab like mine... ><
I just need help.. shit. And with the square intakes, you say lightrap?
I googled that, no help :/