In reply to DizzyVizion:
If you're mostly using it indoors and cash is tight, a 50m rope may be significantly cheaper than a 60m. Just a thought. I don't know of any indoor walls in the UK above 24m.
Of course, there may be outdoor routes over 30m... especially abroad... but, you could equally say there are pitches over 30m... or over 35m... But, 50m is the most usual rope length in the UK, so there are more options for deals usually.
Post edited at 22:00