If you program your songs in BIAB and don't use the generic midi import you can make them sound and actually be pretty free form. we have some songs like I shot the sheriff that is 8 minutes long. we program plenty of measures for riffs. we've extended Sultans of swing to something like 6 minutes or so..if you do it right software for a one man band thing can work great and BIAB is only 300 vs 20,000
Cheers
ce24