Man, 214 CP does seem expensive. Let's do the math!
Chassis:(14" is pretty fast. In standard BrikWars terms, that's faster than most combat planes. In your own battles this means you'll have to scale ranges accordingly; if you use it in other people's battles, I'd tone it down to 10" in order to keep consistency.)
Base Cost: Size: 9" x Armor 4d10 = 36 CP
Move: 14" x 2 (Plate Armor) = 14 CP
Smoothbore Gun: Size 6" Launcher = 18 CP
Remote Weapons Station: Size 3" Gun = 9 CP (correct Range to 14")
30 cal Coaxial: Size 2" Gun = 6 CP (correct Range to 10")
All equipment items must be represented by specific physical bricks.
TROPHY + Cage Armor + ERA: 3d10 Energy Shield, Size 9" = 27 CP
TOG Sight + Gunner's Sight: Gunnery Specialty x 2 = 2 CP
AC Unit: Leadership Specialty = 2 CP
Composite Armor: 4" Armor Plating = 5 CP
By my best estimate, this tank costs 50 + 33 + 36 = 119 CP
, roughly equivalent to 12 armed men. It'll be a couple more points if there are multiples of any of those weapons, and cost of ammunition and crew aren't factored in yet.