Alrighty then.
The problem with your selection of a tubular lock is that they do require special - and expensive - tools to pick (well don't actually require, but for all practical purposes, we'll say they do). If you were to change gears a bit (assuming it's not too late for that) you could pick a standard house deadbolt with only some easily made homemade tools and a bit of practice.
That's just my suggestion.
db