[juancn]

Even if that's the case, it may be possible to make it up in sheer numbers. That's a 15 to 1 ratio. You can throw 15 missiles for the same price than 1.

Even if they're 10% effective compared to the expensive ones, you may still have the advantage.

[hagbard_c]

You need to be able to launch those missiles which requires some platform to do so. If this happens to be a ground-based platform is will be detected directly upon launch of the first missile and targeted for destruction. It better be an agile mobile platform like e.g. the Archer artillery system or it will probably not launch more than a single missile. If the platform is airborne it will have a limited carrying capability which partly negates the mentioned 15 to 1 ratio.