I am just in awe with how patient everyone is being.
If you try to run more than about 2 4x4 tents for your first grow, you are most likely going to learn through abject failure. Even 2 tents is going to be a lot to handle.
Do not run coco with that many plants until you are ready to implement and test an automatic irrigation system. Coco should be fed a lot to use it’s potential otherwise just go with soil. I hand watered 40 plants in coco 3x daily for a few hellish months and it’s time consuming as all hell.
There’s also so much waste water to deal with. Where will you put it, and how? Even with soil and small-for-soil 3-5 gallon pots, you are going to be dealing with runoff from a shit ton of plants. It needs to be pumped or piped or carried somewhere.
The humidity, man, the humidity. 10 tents are going to need a shit ton of air exchanged through them for heat and humidity control. You have a several hundred watt heater in each tent. At least. In the winter, sure, but in the summer you are going to have a real situation with heat management and maintaining a good VPD. Humidity is part of the game as well, and without active air exchange even a single tent without a heat problem is going to be dripping water from transpiration and evaporation.
What floor are you going to have to protect in this rental? Hardware and water don’t mix, but they are better than laminate or carpet and water. Maybe you won’t spill, but I guarantee you are going to have something fail and pump your res onto the floor at some point. Not to mention the drips and spills and leaks and seaps. Plants are a watery game by nature. Plan for it, or lose your deposit.
Speaking of deposit, there’s a whole other situation it’s renting and running a 10k set of rooms... hope your landlord never comes around. Because in addition to SEEING your giant grow, they’ll be able to smell it from blocks away.
Anyway, asking for advice on a 10k grow to prep for a first grow is just bad. It’s like spending time worrying about training for the Super Bowl when you’ve never even picked up a football. You don’t (and couldn’t) even know how to ask the right questions or interpret the advice. It’s not your fault, and I don’t mean to knock you at all — you just don’t know what you don’t know yet. We all start there.
Good attitude matters for a lot, but my suggestion (although, who the hell am I) is to focus that attitude on asking how you can max your first 4x4 grow and then at the end of that think about the issues you’ll face expanding it tenfold.