Best way to set up my AE project? In a nutshell, I just got a new job where I have to create at least 30 MP4 files a day cutting different parts of music videos (even from the same one).
They will provide me the videos to download and I have to make different MP4s in After Effects not longer than 8 secs.

I was thinking of doing it this way:
Project in AE (10 sec composition) with 3 project folder

Footage: full-length videos
Cut Footage: cut videos pre-composed


Here is a problem: cutting in AE is so annoying and (because the main comp is 10 seconds) I have to extend the new composition from 10 sec to the length of the video, find the relevant part, put two markers and reduce again the composition within the markers. Finally, I have to move the pre-comp in the main composition where I can start with the effects and stuff. I do all of this because I want more control of the layers, for this reason I prefer to keep a fixed length layer rather than a reduced layer, like in the screen below:



Render: the folder where I put the pre-comps formed by cut footage pre-comp + effects


What is the better way of making a rendering queue in AE?


So the worst part is cutting, but what about the size of the project? I mean, should I create an After Effects Project every day that includes 30 MP4 files with of course all of the effects, layers, videos, etc. or is it going to be to excessive? Do I have other options?
I found a solution about cutting. I can upload the video on Premiere Pro, cut and select "Replace With After Effects Composition" and that's it, that feature is amazing for this type of work! Thank you all by the way!