Mystery, that sounds like a huge investment. And with what you've listed you seem like you won't be able to fail.
From your post i am not sure if you will try to get advice and best advertising there is for getting more people that spend tons of cash individually or if you do follow the BIG TITLES and ask for an averagely low price / set.
If it's the former of the two, i still rather not give up on few brand new games to afford an entire new set. Good luck anyway if that's the case.