the tech is technicaly cheap and is only one-time buy.
after that you can build this super cheap unit all where you want and can now hold the area easily. when i say super cheap...yeah..i mean super duber cheap compared to its performanche.
It simply is an area denial tool like MG Bunkers. You pay fuel but get a 360° arc. Right now you are trying to make the Bofors a no-brainer which counters everything but the heaviest tanks, which is not the case. A single mortar or even better leIG and the Bofors can't do shit because it cannot runaway. You need Sappers to repair it constantly (making them bleed like hell because of repairing damage penalties) unless you play fortification doctrine, which is shit.
where can i get a 30 fuel unit wich wipe squad often in 1-2 sec
It wipes fast but 1-2 seconds is an overstatement.
can barrage/ pin unit wide away
Unless you put a squad inside, it won't pin anything. Nobody uses the barrage anymore after the FRP nerf because Brit units are expensive as fuck and you won't waste 280MP only for some light barrage things that is mostly used to tear down houses.
has AA abilty,
It doesn't. It literally does NOT harm planes. This is a bug, but still.
has brace, stand longer than a schwerer building from OKW and where the enemy need min a mid game army to destroy it when you arent a noob?
Compared to what? OKW - Build 2 leIGs and the Bofors melts like butter. You don't lose any fuel while the enemy spent 30 for literally nothing and also is not able to get an AEC anymore. Ostheer: Build a mortar and a flame 251. Smoke + attack ground -> Bofors gone, 251 Vet 2.
ALSO, that 45(?) fuel for a single Bofors means a 3-4 minute longer time until a Cromwell arrives. AND you also lack the MP to build an AT Gun, which means that an incoming Panzer 4 will tear you apart.
mix it with aindirect fire unit and a AT gun or a td...any viola-.--your enemy need a endgame army or must spam arty
Indirect fire as in mortar pit which was nerfed into the ground? Also, about 900MP + 30 Fuel only to defend a small area of the map is a huge investment. That can be negated by Mortars/leIGs easily. And also the enemy has a way better army if you put all your MP into this immobile trash.