Can't believe i forgot about Miniwelders.  I blame sleep deprivation.<br/><br/>Availability 2, 250¥, and a Damage Value of 15 against barriers.  You can add that to your roll to attack the wall with it, if memory serves.<br/><br/>It'll take a while, but will probably be a much better bet than explosives, unless you have lots of the Demolitions skill.