From my perspective, most people who attend are already organised, multiple social media accounts from radio x to BBC list out articles saying what you need to do to have a good chance to get tickets.
To me there's no difference in saving to pay for the ticket in total or with a balance - what the balance attracts is more people who might just wing a chance for a ticket if they aren't that invested.
When I was younger I used to save for festivals all year round, and put a little away each month to help the burden of the full amount when it was due.