I agree with others that a sketch show would be better to start with since it's not gonna begin as an experienced & professionally qualified company. Better to learn how to do the minor miracle of simply writing/producing/directing/acting material that is less than 10 minutes long than attempt 6 shows of 30 minutes each and honestly expect to produce something marketable the first time out of the gate.
I'm as positive as anyone else but there's a difference between realistic enthusiasm and clearly biting off more than you can chew.
As for the writing parameters: We need only keep in mind that we are writing for a tiny/almost non existent budget: Simple sets. Simple locations. Shoot scripts after enough have been written and collated into certain piles indicating which multiple scripts can be shot at same location or same set. I think Python did it that way sometimes.
As the starter of this thread and one who has maintained participation in it, Rob, I would say you are becoming a sort of hub, an organizer, and that's worth encouraging. I would put my feet back on the ground and start from Square 1 and prove to yourself and others that you can pull off the minor miracle of simply organizing the shooting of various sketches that aren't more than five or 10 minutes long.
It would be all volunteer: the writing, acting, filming, editing, and uploading to Youtube.
Talking about money at this stage of your very obvious lack of experience regarding entertainment production just ain't on, mate.
I mean, you actually thought charging writers 10 quid would keep out the shite and yet that's about all that is submitted worldwide both for free and WITH entry fees.
Not busting your balls, just wanna you see you succeed and I don't think climbing Mt Everest for your first hiking experience is gonna end in success, but if you got the burning urge to go for it, then go for it. Every failure is a learning experience if you are truly intending on succeeding, and thus it is not a failure.
Just thinking out loud, Rob.
Keep refining it, man. Don't give up on being an organizer.
The Mutherf**ken Skibster