Looks good, with 2 tents you have some options in the future. A little feed back on the ventilation.
One inline fan for 2 tents might not be able to keep up when the stink builds. There's a math formula to figure out what's necessary for a given volume although I can't remember it. Maybe someone else could chime in. You might find that you need to run the fan at top speed all the time and find the noise irritating, or that even at top speed it won't do the job.
Also, you want to have the shortest, straightest run of venting so the fan motor works less, does more. The way the fan/filter is standing up the venting could kink and prevent good air flow.
The air intakes, close to the bottom at the sides, are up against the wall, might be an issue. They need to be open so air freely moving in as the inline fan removes air, or at least the intake in the tent on the right in your 2 tent set up. You might want to run a simple smoke test to see how air moves through the system before you plant.
What soil are you using?
Best of luck.