Thanks for the reply and for the estimates! I think it's a good deal and a potential cool competition since a lot of stuff is left up to participants. I've registered for it today. 20 bets within less than a month is more than I usually do, but I'll try to make them and not forget about those screenshots 
I also have another short question: what's your stance on multi bets? Are they also allowed, or should these only be single pre-match bets? Thanks in advance!