about 185' of 2" .120 DOM in my cage, and about 16' of 1.75 .120 wall, and about 10' of 1.5" .120.... I really like the look of 2" on the fullsize rigs.... so maybe $1100, 1200 or so... I would guess most cages average 160' to 220' depending on "family", etc, etc..
So that's nearly 500lbs of tubing, not counting plates, tabs, etc.