We present the results from a South African Large Telescope (SALT) campaign monitoring the time variability of C IV broad absorption lines (BALs) in 64 high-redshift quasars with high-velocity outflows (v > 15,000 km/s). Our findings show that BAL variability increases over time, with SALT enabling detailed analysis on both short and long timescales. While BAL variability shows no significant correlation with quasar properties like black hole mass or Eddington ratio, a moderate correlation with bolometric luminosity is observed. Detailed photoionization modeling of a few well-monitored sources highlights discrepancies between observations and simple accretion disk-wind models.