Stop building only exmplacements in your games as ukf and you will see they are not too cheap.
Stop being afk with all infantry blobbed and you'll see they are as effective as single mortar of any other faction, except completely immobile and the moment you lose ground, instead of losing 20-60mp, you're losing 350.
it most games you build in smart possiton and use it as smoke and barrage platform and wipe on the vps at front and it oesnt even bleed 1 manpower.
isnt this hard when you dont build it at the 1. line. dont use it at arty for enemy base...use it at support to the front..means 70 range from it