YouTube Channel Custom URL shortcuts?

I was tasked by a client to grab the custom YouTube channel URL for a new page. The 4 qualifiers they say you need are:

• Have 100 or more subscribers
• Be at least 30 days old
• Have an uploaded photo as channel icon
• Have uploaded channel art

I bought 100 or so subscribers for the sake of the URL and uploaded art and icon- can anyone confirm that the Custom URL eligibility will change on the 30th or so day? Is it strict about it or are there shortcuts to not having to wait the month to claim the URL? Thanks!

Anyone know the exact parameters to get the custom URL?