CLan I can make a fairly good estimate based on troop numbers, equipment and policy statements.
For a start if you wanted to arm light helicopters new build twin Fennecs cost under E2m and come with a much longer operational life expectancy , broader utility and up to date avionics.
Also rocket and machine gun helicopters suffer from very high vulnerability when they get close in or face being relatively useless when firing from a safe distance (ask anyone who served in northern Iraq about CAS from Kiowas).
There is a case to be made for ATGM carrying light helicopters but again in order to exploit the latest technology in that fast moving field new build helicopters would be the realistic option.
I have myself advocated operating additional 20mm armed Gazelles in the past but on further investigation I found that the short term savings of buying secondhand LUHs would be minute, and all military light helicopters seem to have and option for a 20mm pod anyway.
Silver: The A109 and Dauphin don't carry nearly as much weight as it says on the tin, the 212 on the other hand is a certified lifter that can be relied upon to lift a fully bombed and bagged infantry section or sling load a 105.
Putting rockets on a 212 would be wasteful, it can generate far more fire support by supporting the operation of crew served ground weapons.
The last gulf war has proved beyond a doubt that helicopters are not well suited to CAS, that includes flying tanks like the AH-64, I doubt the A109 MA models would fare much better than the Kiowa Warrior.
